How is ther more value? its more expensive. I dont think many people care to own the same game on two systems.

hooray i get 2 games for the price of one 

thats the main draw card

I don't see it affecting 360 sales much as 360 only owners will simply get it on 360 - they won't buy a PS3 just for Portal 2.  However, I do see the PS3 version getting a nice boost and that will be down to PC/PS3 owners.  I believe there is a fair number of PC/PS3 owners who will get it on PS3 as this allows them to play it on PC anyway.

I've never bought a Valve game on anything but PC but I will get it for PS3 simply because it makes sense to have it for both rather than one and most PC/PS3 owners I know or see speaking on boards seem to be thinking the same way.

So I don't expect much change on 360 side but I'd be surprised if PS3 didn't sell better than it would if you didn't get it on PC essentially for free when buying for PS3.

@Reasonable

Many people have the two consoles but buy their multiplatform on 360 because it is their main console... So I can see these people buying Portal 2 on PS3.

I can see it having some effect, but mainly for PC people. If I was buying the game at release, then I'd probably pick up the PS3 version and use the "one time use code?" for the Steam version and then just sell the PS3 version. It would be like getting a nice discount on the PC version.

I'd imagine many people (like me) will just wait for when the game goes on sale, like with one of Steam's great Holiday Sales. I picked up Portal 1 awhile back when I bought the Orange Box for $9.99 during a Steam sale. I'll just wait for another one to pick up Portal 2 as well. ;-p

Nah, I don't see that TBH.  IF the 360 is their main platform their going to want to play coop with their friends on 360, get achievements, etc.  Buying it on PS3 to get it on PC if you mainly game on 360 doesn't make sense to me.

What I see happening is that:

a) this could really help win over PS3 owners who say Valve in a negative light before - I think Valve have surely set the bar in bending over backwards to make this title and their brand appealing to PS3 owners

b) a large percentage of PS3/PC owners will get it on PS3 rather than just PC.  I'm in this camp and most of my PC gaming friends are taking the same route.  This is where the boost will be for the title I think

c) 360 focused gamers (even those with PS3) will get it on 360.  I mean a few will be swayed, sure, but not enough to really notice I suspect.

Just my view mind.  I could be wrong and we'll soon know I guess.  But I feel Valve have been canny here and know they will do okay on 360 but - as with Bulletstorm - the risk is being ignored on PS3 and I believe their play is to make the title attractive to PS3 owners due to the lure of Steamworks, cross platform play and ideally the definitive console version plus get a bunch of people who'd buy it on PC to get it on PS3 to elevate the PS3 numbers by basically giving them the title on PC as well.

I also feel Valve are hopping for enough success on PS3 to give MS a push to allow Steamworks on 360 - but I think that's not going to happen.  If Valve really want to push Steamworks and cross platform ownership then at this moment the PS3/PSN is the far better platform for them that 360/LIve and I don't think MS will be too concerned if this means Valve give PS3 more love than 360 going forward hence why I don't think they'll shift on allowing Steamworks on 360.

Well I was going to get this for th PS3 version so that I can play on my PS3 while p[laying with my Steam friends at the same time. Plus I can also play the PC version anytime I want.

So for a player like me, it's a Win Win for me :D

I have all three and I'm still buying the XBox 360 version. I'm not getting it right away either. Most like 4-5 months after its released. It's not a big deal to me. No matter what I won't pay full price for the game anyways.

Most likely im gonna be playing the pc version of the game, but I still want the ps3 version regardless because i'm interested in this steam/psn integration and I want to see how it's going to work and you can't do that without buying the ps3 version.

My main reason for buying the ps3 version is because amazon is giving a 20$ gift card for preordering the console versions :) So why not take up the opportunity? 

I guess something in the line of being stupid and buy it on the X360?  While the PS3 version has more value?  So it would rather make sense to buy a PS3 for this game..?

The meaning : Something stupid that is for sure =p.