When you click the "optimize settings" tab on the new system, the settings will probably max out. You'll probably be running at the maximum resolution that your monitor supports, with very high detail textures and models, as well as anti-aliasing. It'll look awesome. You also shouldn't notice ANY slowdown during gameplay unless it's network lag.
edit: let me put it this way:
Crysis on low: (close to what you've probably got now)
Crysis on max: (you'll be able to max it)
open the links in tabs and switch back and forth between them. See the difference now?