Lets face it. A mirrorless camera that respects legacy users. Olympus PEN (not OM) Nikon 1(Not F) Sony NEX (Not MAF) Samsung (Not K) Pentax Q (not K) if the canon can take a fully functional EF lens, even via an adaptor then it is ahead of everybody else (Sony get close, but no cigar)
That summarises what I'd like - I'm looking for something compact, that can act as a second body to a 5DII/III or 7D, and also is an option for traveling light, which I can mount on a gorillapod. My wishlist is: manual mode, RAW, connection for cable release, EF/EF-S adapter, compatibility with E-TTL II Speedlites. A GPS would be a nice-to-have feature. The lack of external controls is a little bit of a concern, but I can probably live with that - given that this camera would always play second fiddle to a DSLR. I'm still in two minds about the apparent lack of an optional EVF.
I have come to terms with the fact that the sensor will be no better than what the current crop of APS-C Canons can offer. I think Canon is holding back its new sensor technology.