One of the main User interface and gameplay variables is the amount of units that a player can control at a time.
It limits the amount of targetted damage output, the amount of workers you run away from the Psi storm, the amount of Hydra's you patrol in at a time.

Karune stated that at this point, the amount of units selected is unlimited, I do not believe that this will be the case, and we will see 36 units per selection.

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Admiral Anderson Mccutcheon
Inspector General
TerranoZergus Project

WC3 players will probably just need 2 selectable.

Frigin micro freaks.

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How many emos does it take to change an Ultralisk?

Boo. I want unlimited, that way I can charge my uber squad over to the enemy and take over in a matter of seconds. No but seriously, I think the 36 unit restriction would be good as it makes you choose your units wisely, and also keeps you alert. Since when a different squad is attacked, you have to switch on over.

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Limitless is a must in SC2, it wouldn't be too hard to do since you can just use the multiplier like they did in Star Wars: Empire at War, but once again unlinke SupCom Starcraft 2 is aiming to be more about individual tactics and less overall strategy. SC2 is clearly aiming for an operational UI which helps you coordinate individual units instead of giant groups of them, this is obvious since in the unit selection box, each time a unit dies, it leaves a space so you can clearly watch what casualties you are taking in an attack.

I think 24 is pretty good. It's a complicated issue. It's not about "i'll select my unnits and you will die", it's about gameplay, need to see the map size, micro action (imagine selectin unlimited stalkers but microing none!), and such.

I voted unlimited... but then I just imagined something.

Once in a while I do a full Zergling rush, make a hell lot of Zerglings, around 150 at least (not in many games, but in some games)... I burrow them first, stacking them near each other, then raise them 12 by 12... now, if you were to unborrow 150 at the same time...

I really like the idea of unlimited, similar to Company of Heroes... I'm just nervous it will take away from some of the tactical planning involved in say W3.

I remember storming with 5 groups of dragoons in SC and it could be very effective... Doesn't work the same in W3, so we'll see what happens.

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Starcraft 2 Tournament Forum Starcraft 2 Bunker News, Discussion, & Release Date Info for SC2

i hope its old school 12 units still.. i think letting you select 24 or limitless is bogus you grab an entire armada of battlecruisers and wraiths and bone the crap out of somebody or same with a ground force... 24 isnt really all that bad but same concept of grabbing 12 bcs and 12 valks or wraiths... makes using very strong guys way to cheap

Guys think of it this way..
If you were really in charge of a whole base so to speak, would you be able to command all of them at once... some times maybe but most likely no... think realistically 12 at a time is good, if you want to plan a mass attack do it like a real commander would.... Use your Ctrl 1..2...3..etc. If any thing I think 24 can still remain realistic, so I vote to change it to 24, but no higher than that... One thing is for sure there should be no cap of guys you can make, the 200 in SC1 is horrible, say your in a 20 min game playing fastest map, against a zerg with like 30 hatcheries and your protoss... even if your a good protoss, you wont be able to win against a decent zerg... simply b/c it takes zerg 1 minute to build 90 hydras and takes you, 1 minute to build 30 dragoons if your lucky. Yes I know there are templars and all that... but if you got 50 probes which you more than likely will you can only make 150 guys tops, and most Protoss units take up 2 PSI, so the mass for a zerg will crush you eventually... your only bet is to keep making arbitors and recalling his money every chance you get. Zerg will just stay maxed the whole time while on the other hand you can't.

So I think the units you are able to make should be unlimited... If there is a problem with the servers not being able to handle that... fix it, you got games that are able to have 60+ players playing on the same map at the same time... yet you cant handle 8 players with 400+ units each. thats just nonsense...

"Zerg will just stay maxed the whole time while on the other hand you can't.
So I think the units you are able to make should be unlimited" teariz we have the same idea although i could never agree with unlimited units... your saying 200 units zerg stay maxed all the time... and protoss can get there or not.. but you need more population to do something in a game like that.. but think about it 200-zerg max protoss maybe gets there unlimitied-zerg=one gigantic army hydras zerglings ultras mutas and everything.. you would have the ultimate army there with unlimited and as you said protoss would take longer to spawn so they couldnt build an army fast enough to stop them... you would be over run in 5 minutes flat so what your saying about unlimited pop helping the protoss is silly cause in reallity it would make them weaker in that type of situation