An interesting take on the future of camera formats:
Why DX has no Future
Before the advent of mirrorless cameras, it's hard to imagine what can possibly happen to the DX/EF-S format. But by now, the writing is clearly on the wall: m43, Canon EF-M and Sony E mounts are here to stay. The Nikon CX mount will probably survive because of the Nikon brand name, but it's gonna be a niche player.
To be honest, I am contemplating dumping all my Canon gear for m43 stuff. Oly finally got their sensor shortcomings sorted out with the E-M5. But the m43 line-up does not have any equivalent to (i) the 16-35 mm lens without a bulbous front element (ii) the 150 mm 1:1 macro lens. So, I'll continue to wait and see..