The problem with gaming this year (and to an extent the last few years as well) is completely summed up by that fat Bobby guy from Activision. And by summed up by, I mean he is the perfect example of the cancer killing gaming. Massive idiot in charge of a massive company means massive failure incoming, cap'n.
What the core gamers should be doing isn't looking to the money-hungry slobs that are the commercial giants (because all you'll get is COD:MW2), but to the smaller companies and teams, who actually have to do something to sell their product other than put Call of Duty on the box. They have to bring in good gameplay, because their survival depends on it. They're not in the business of fan service, rather attracting new fans.
As such, we've actually had quite a good year. I'll throw some examples out...
As for the RTS genre, well, we had to endure Hola's attempt to try that sort of thing, and fail epicly, but the lack of a good well-known RTS doesn't mean there isn't a good RTS.
EVERYONE HERE GO ON STEAM AND DOWNLOAD EUPHORIA. NOW.
(or, at least download the demo, available here: http://www.eufloria-game.com/read.php?page=8)
Brilliantly simply RTS, and an absolute steal through steam. It's not overly complex like most big-name RTS games (oh look we have the most features buy me now!), so you can get right into it.
The racing genre has had to deal with a new Need for Speed (oh god NO) and another Forza. Both really miss the mark, because the need for speed isn't as beautiful as it once was (hot pursuit 2 and Porsche Unleashed still set the benchmarks for NFS games) and Forza is trying very, very hard to be GranTurismo for the casual crowd, so not a huge success.
IF YOU HAVE AN XBOX GO BUY HALFBRICK ROCKET RACER NOW.
No exceptions. It is to racing games what Jesus was to people.
SSBB-quality multiplayer, and some of the most tense racing in single player EVER. You WILL find yourself chasing that extra thousandth of a second. None of this pretend realism, heck, no AI! But it's all the better for it.
My main point is that for new, genuinely fun gameplay, don't bother looking to the big businesses. Look to the people who are still in this because of passion.
World of Goo (bet you'd forgotten about this little gem, right?)
Braid
Plants vs Zombies
Eufloria
Rocket Racer
AAAAAAaaaaaaAAAAAAAAAaaAAA: a Reckless Disregard for Gravity
And tons more.