I'm still blown away by the fact that Metabones believes there is a market for $600 EF to NEX/MFT speed booster adapters. The plain ones with AF go for $300. Canon will really need to up its 'M' game to make those choices moot.I acutally considered going with that route for a 2nd body. Getting a GH2 for video or an NEX-7 for portability and using a Metabones adapter rather than amassing a new collection of glass. It's actually quite smart because neither company has a collection of lenses that even comes close to competing with the EF-mount system (both Canon and 3rd party options). Yet they had bodies that can do things their Canon counterparts can't.
I actually think that's a market that will continue to exist even if Canon steps up their M game, because they are now several years behind, and they certainly aren't making aggressive moves to match what Sony and Olympus just put out
Obviously, you're not alone. I didn't see it mentioned, but I wonder if Metabones has an EF to M speed booster in the works - should be cheaper.
I did notice that Sigma just introduced three new µ4/3 lenses and Tamron has a new zoom - I guess they see that as the hot market www.43rumors.com