To be honest I'm a little disappointed. Especially after what was changed with photoshop CS6. I mean I know they're two different programs but the step up between CS5 and CS6 was pretty nice for me. Like even small things like constraining crop ratios really easily in CS6 made my life so much better (I like the 5x4 format for certain pictures), so Lightroom made me a little sad. I will be looking forward to smart previews though, because I hate editing in RAW only to see it come out meh, and then reopen it again. Also Lightroom 3 to 4 was pretty big so this isn't quite as significant I suppose.