Honestly I think the all black and white sensor thing is pretty cool. I mean, it sucks that it's 10,000 dollars but I find myself converting images to black and white a lot. I think it's because colors to me, are never "poppy" enough, and when you introduce a lot of contrast into a color photo it ends up looking like shit, but when you introduce a lot of contrast in a B&W photo you get really deep blacks and white highlights, without losing a shit ton of shadow/ highlight detail.
It's really all about the subject that you're shooting though. If I'm shooting any type of action sports, I don't go black and white that much. If I'm shooting nature/wildlife, I don't go black and white that much either. Any street stuff, or city stuff, or architecture, I'm always switching stuff to black and white.
Maybe that's just me though. I think I'll go buy some black and white film now. Haha