Sage man, I sincerely think you're only getting this impression of stagnation because of the fact that we have so much information these days that's it's very easy to keep track of every game released each week... and also that now, as an adult you can consider video gaming as a whole, including the market it represents...
But franckly, remember these "good ol' days"...
How many side-scrollers did you play on the NES ?
How many Street Fighter clones did you play on the SNES ?
How many Doom-like FPS's did you play after 1992 ?
How many survival horror games emerged after Alone in the Dark/Resident Evil ?
How many puzzle gamse flooded the market after Tetris ?
How many generic 3D fighting games did you play during the 32/64-bit era ?
How many games are directly emulating Mario 64 or simply exist because of Mario 64 ?
How many Dungeon Crawlers on DOS ?
How many Point & Click games made by both Sierra and LucasArt between 85 and 95 ?
How many racing games tried to tackle Gran Turismo's haegemonia ?
How many Shadow of the Beast rip-offs on Amiga/Atari ST ?
How many games bet on digitized graphics after Mortal Kombat ?
How many FMV games flooded the CD-Rom market after the 7th Guest ?
Heck, HOW MANY SPACE INVADERS CLONES ARE THERE ON ATARI 2600 ?
So JUST SAYING, that it is true that right now all shooters feel like Call of Duty, all Beat'em up's feel like God Of War and we can't keep track of the Guitar Hero and Rock Band sequels...
but it's just a PHASE , that's what's popular right now, yet there are still a lot of original games coming out these days, with fresh ideas, concept or just art direction... and soon you'll see new trends emerge and dozens of clones will arrive... it's ALWAYS BEEN THE CASE !
(same for the "revolutionary peripherals")
So I'd say ENJOY the seemingly endless wave of shooters while it lasts, you might miss them someday... except for Turning Point though :)
PS: I guessed Sniper Ghost Warriors ;)
ATTENTION READER: this is not a personnal attack or some attempt to start any sort for flame-war, I got nothing against Bennett or anything so don't get carried away with B.S. drama or whatever...