Looks like Ubisoft is keeping word to their earlier announcements, and respect for that. They released minimum, recommended, and high-performance system requirements for the game, which are a bit stringent alright. Which indicates great graphics. It was also announced that the game will implement a revised Uplay DRM scheme that needs a one-time activation, and doesn't require you to stay logged-in when playing the single-player campaign.
The Far Cry series has always demanded a bit of muscle to run well on PC, though of course the advantage is that it's looked best on PC. Ubisoft today confirmed Far Cry 3's system requirements, so see if your computerator has the grunt to run the latest open-world-y FPS.
CPU: Intel Core2 Duo E6700/AMD Athlon64 X2 6000+ or equivalent dual-core Video: Nvidia GTX8800/AMD Radeon HD2900 or equivalent 512MB DirectX 9c card Memory: 4GB Recommended Specs
CPU: Intel Core i3-530/AMD Phenom II X2 565 or equivalent quad-core Video: Nvidia GTX480/AMD Radeon HD5770 or equivalent 1024MB DirectX 11 card Memory: 4GB Hi-Performance Specs
Video: Nvidia GTX680/AMD Radeon HD7970 or equivalent shiny new DirectX 11 card CPU: Intel Core i7-2600K/AMD Bulldozer FX4150 or equivalent quad-core Memory: 8GB