Really though Crysis is just one game that you might play for 20-30 hours or so tops.
The real metric on the next round of video cards is how well a single card - SLI and its allies always have problems - runs a chosen suite of high-end games. I expect performance at native resolutions on 24" LCDs with 1920x1200 resolutions, with AA and AF, to be more than playable, which is something that is actually asking for a lot with the current market leader cards that are available.