... to make the rebel line even smaller and appeal to those looking to advance from the compact P&S but fearing the size of an entry DSLR. ...
UK Fashion Shooter Jonathan Posner has stepped-up from Canon's Full Frame 5D2 to the M4/3 Olympus OM-D http://jonathanposner.tumblr.com/post/40780795719/my-olympus-challenge-10 To quote Jonathan Posner "Good enough for Vogue Italia, good enough for me."
There are a lot of seasoned professionals who are tired of lugging-around un-necessarly large/heavy cameras and their large/heavy lenses.
I'd be interested in a smaller EF mount APS-C camera with an EVF. Canon really needs to introduce some EF-S primes for use with this camera. A 22mm f/1.8 (=36mm FF) would be a good start followed by a 15mm f/1.8 (=24mm FF). I already have the EF 85mm f/1.8