That's what you get with yearly releases of an OS that's very mature already. Lion however had a lot more to offer than just Launchpad (useless) and Mission Control (which I find very useful). Discless installation, Recovery mode, merged Software Update, Auto Save, Finder refinements, Safari 6... And Mountain Lion did add a few nice functions, though, I agree, nothing spectacular; but we didn't pay a lot for it anyway and a lot less than we used to. So why complain? I'm sure that going from 10.7 to 10.9 will be a lot more revolutionary than going from Leopard to Snow Leopard, which added almost nothing!I'm really not even looking forward to this at all. OSX announcements used to be exciting, but newer features like Launchpad and Mission Control do not add anything to my experience whatsoever. Even the under the hood improvements rarely seem particularly interesting anymore. I still get every new version, but that's mostly because I feel forced to for compatibility reasons.
Honestly, without a fundamental change to the way the computer works (something one might expect in an OSXI, not an 10.9), I don't even know what features I would like them to add anymore.