imagine this scenario, farcry @ 1080p60hz vs crysis @ 720p30hz.
crysis would look way better, and imo would feel just as smooth, thanks to motion blur and per object motion blur, which really takes the edge off the jerkiness at lower frame rates.
Have you tried it at different frame rates? You might get a similar 'look' but you will get a really different 'feel'. And that is what is important when you play games.