100% true.
Make a list of all the big budget games, easily more than half will be forgotten.
Here I will make a list for PS3.
Ratchet and Clank, MGS4, Uncharted, Lair, Heavenly Sword, Haze.
Out of those MGS4 will be remembered, Ratchet and Clank as well as Uncharted MIGHT have a chance, the rest just suck, of course this isn't all the games but you get my point.