I haven't read any respones yet, but I'm pretty much a fact stater so listen to me if you want good games. Oh, and don't bother doing this:
insert game you think is bad
Blu-ray Disc:
Buy
Resistance, it's an awesome experience (single player wise too for the story, prepare for R2)
Skip Motorstorm, it's an fucking awesome game but
Pacific Rift will rock it's world.
Virtua Fighter 5 or
Soul Calibur IV or both if you're into deep/fun 3D fighting games.
If you liked previous Ridge Racer games, you're gonna LOVE
RR7. It's single player contains at least 50 hours of fun (and fucking frustrating) gameplay. Multiplayer is OK.
Elder Scrolls IV:
Oblivion if your PC sucks and you're into American RPGs. Check out some videos of this before deciding to buy it.
The Darkness: Really, REALLY engaging story with pretty good gameplay. It tends to get repetetive towards the end but the story will make you play it
twice.
Ninja Gaiden Sigma: If you haven't played any other Ninja Gaiden games and if you're into action games that requires deep fucking reflex skills.
Heavenly Sword: It's platinum now. There is no reason what so ever not to buy it. It's 6 hours long, yes, but it's one hell'uva ride experience. Do not miss this one.
Warhawk:
Just fucking buy it, seriously. Also adding that people are constantly playing Warhawk, finding servers to play in takes less than 5 seconds.
Ratchet & Clank Future: Last years GotY for me, but GAF hates it. I'll just recommend it for you, since I don't want to get killed.
Burnout Paradise: Incredibly fun and addicting. Some parts are too frustrating but overall experience is a no-miss. Try out the demo and see if you like it. If you don't like it, buy it. If you do like it, buy it (no typo, seriously. The demo sucked).
Uncharted: RAWR >
Devil May Cry 4: Holy shit, don't trust the haters. This years best experience if you take MGS4 away. Top notch gameplay, amazing graphics and awesome cutscenes. Some people don't like the back tracking but it shouldn't stop you from playing it through at least once. Oh and Bloody Palace alone makes it worth it.
GTAIV: 
MGS4: !
PSN Network:
fl0w: Cheap and incredible, 'nuff said.
T5: DR Online: While the online part pretty much sucks ass, if you like Tekken, you'll love this one.
Puzzle Fighter II HD: Download the demo. Enjoyed it? Buy it. It's awesome.
PixelJunk: Monsters: This one will rock your world. Heck, you don't even need to like tower defense games to like Monsters, it's
that good.
Stardust HD: Addicting as fuck,
now with trophies, demo sucks, just buy it.
PixelJunk: Eden: Best PSN game out there, got over 60 hours from Eden.
I skipped some games but my fingers started to hurt so :/
EDIT: Oh you wanted future games too? I'd put the list up but there are titles like T6 and FFXIII there, those won't be out for a while so...
Killzone 2
Resistance 2
Pacific Rift
Wipeout HD
Next PixelJunk game
Fallout 3, look for Oblivion above.
LittleBigPlanet
Bioshock
Yakuza 3/Kenzan
Valkyrie of the Battlefield
Mirrors Edge