The CUDA/Stream stuff for GPU computing is really only useful in games for physics. The rest of it is mostly useful for transcoding video (if you want to rip a Blu-ray to iPod format or whatever). It's also pretty bizzarre how it's coded. I read some code that was C# and doing floating point calculations on a texture.
Although it's changing a faster dual core is pretty often faster in games than a slower quad core because games are generally poorly threaded. Doubling CPU processing power comes nowhere near doubling your framerate even when you're not GPU limited. Compare that to video encoding or 3D Studio Max/Photoshop/whatever and it is pretty apparent.
http://www.tomshardware.com/reviews/...us,2414-7.html
That's all pretty irrelevant though, because if you're upgrading you should be going with a Core i5 or Phenom/Athlon II X4.
There will be a Core i5 (or i3, I'm not sure really) that has an on package GPU, but it's performance is expected to be pretty awful and only 1.5x faster than Intel's current onboard graphics. It's also only dual core. The 6 core i7s are expected to cost ~$1,000, so I wouldn't hold out for them personally.
There's plenty of pretty looking cross platform games that run on PC and PS3. If you can run Crysis at a playable framerate I really doubt you'll be unable to play FFXIV.
I'd think the "different textures" on the PS3 probably means it'll use compressed ones since it only has 256MB of video memory.
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