Raise your hand if you call tell the difference between: Upscaling softness, anisosotropic filtering, and texture resolution. If you cannot, then you're not qualified to determine the difference between the PC/PS3 Tomb Raider shots.
Recommended system requirements for current games (CPU):
Farcry 2:
Recommended
CPU:
Intel Core 2 Duo Family
AMD64 X2 5200+, AMD Phenom or better
Left 4 Dead:
Processor: Intel core 2 duo 2.4GHz
Saints Row 2:
Processor: 3.2 GHz Dual-Core Processor (Intel Core 2 Duo or AMD Athlon X2)
GTA IV:
Processor: Intel Core 2 QUAD @ 2.4 GHz/AMD Phenom X3 @ 2.1 GHz
Crysis Warhead:
Processor: Intel Core 2 DUO E7300 (2.66 GHz)
Race Drive: Grid:
Processor: Intel Core 2 DUO @ 2.66 GHz/AMD Athlon X2 3800+
World in Conflict:
Processor: Any Intel Core 2 DUO
Minimum price of a prebuilt system on Newegg which meets these CPU specifications: $370 + Shipping
http://www.newegg.com/Product/Product.aspx?Item=N82E16883103188
Minimum price for a graphics card to meet these requirements: $80
http://www.newegg.com/Product/Product.aspx?Item=N82E16814161252
Likely Total incl shipping before tax: $480
Take it however you wish really. If you don't need to upgrade your system then its a total cost of $480 just to play games, if you do need to upgrade your system then the total cost is about $80 including the graphics card. Remember most people are fine with a 1.6ghz sempron on Windows XP.
More than 50% of new computer purchases are laptops IIRC. Low quality screens, low battery life and they get hot and uncomfortable if you game with them and they are hellishly expensive if you want that capability. So the comparison between a desktop and a console is becoming moot.
Tease.
