I think new retro 8-16 bit games are an awesome idea. Then again, I'm gettin' old, so it's more of a nostalgia thing. The 8-16 bit throwback idea is actually responsible for getting me interested in programming. I really wanted to learn how to make games, and the old school style is more approachable, from a beginners' perspective. Outside of Megaman 9 + 10, I didn't really know it was becoming a big thing until recently.
Now, how these new retro RPGs actually are
. That's a different story. Half Minute Hero didn't seem like a fun concept to me, I don't have access to Breath of Death, and I haven't tried ClaDun yet (dead PSP battery). It could very well be that the concept is better than the actual execution of it. Still, I really like the idea and the art style. I think it would be really interesting to do new things with 8 bit 2d graphics that weren't possible back in the day. This is a pretty good example, it's a fan made 2.5D Megaman 2 remake. http://www.youtube.com/watch?v=ZiwQtSx6zHw