I think it's due to mobile phones/tablets eroding traditional gaming venues in the same way it's been doing to PCs. Nintendo has usually done its own thing and managed to succeed (except for the Virtual Boy). It was strategy was somewhat visible back in the N64 and Wii days. The Wii-U seems like it's trying to follow the Wii, but I think changing markets will make that less successful. But then again, it's Nintendo; they'll likely find away to make it work.
Sony has been much harder figure out. Sony's been known to whore technical specifications at the expense of simplicity; the PS2 and PS3 were technical powerhouses but a pain to program for. The PS4, on the other hand, is basically a modified x86 (read: PC) and thus is simple to program and port to/from the PC. That's probably why the indie game devs love Sony. Maybe Sony is actually aware of shifting markets...
Also, it looks like another oldie is getting remade:
I wonder if it's out of nostalgia, or if people are running out of ideas for games that leave a fond impression.