Well my computer is just a few months old so I would probably be able to run TS3 but I don't think I'll be running out to get it right away. I've spent too much money on TS2 to just give it up. Its not like buying a $50 game and then a couple of years later spending another $50 on the next version.
The Sims2 and all its expansions & stuff packs is no little investment. Its been a while but I'm thinking that the base game was 40 or 50. The expansions have all been about 30 and the Stuff packs 20. That is upwards of $500 for the whole shebang and that's not even adding in any CC subscription sites that a player may or may not have purchased.
Wow.. now I wish I hadn't thought that through. I can't believe I've spent that much on a computer game.
As someone else noted, there really doesn't seem to be the same amount of upgrade that we got when we moved from TS1 to TS2. I'm just not sure it would be worth it.
I do like the way you can change the color/fabric of the furniture & stuff though. I wish they would add something like to that TS2. I could easily be suckered into buying another TS2 expansion pack that added something like that.