Of all Sony cameras, none of which I really care for, I think the RX-1 is probably the only thing I am truly intrigued by from them. I would probably get one, however the EVF is another $500, and it has a funky eye cup that I don't think I would enjoy. The notion of a FF compact that offers DSLR features (with the exception of a removable lens) is pretty nice.
For some reason, since EF-M is pretty much limited to APS-C from an image circle standpoint...I don't really see Canon making a FF mirrorless, and I guess as an extension of that, I don't foresee them making an FF compact of any kind either. At least, not unless they see a compelling enough reason to do so, i.e. good cause for it to make them a lot of money. Given the RX-1's price point, it'll probably be a fairly niche item.
I've also read several articles lately noting that as smartphone cameras become more and more prevalent, that actually seems to be translating into an even GREATER demand for DSLR cameras. There seems to be a conversion factor between having the commodity ability to take moderately good digital photos, and the desire to take very good digital photos. The DSLR seems to be a cash cow for Canon, which I think again diminishes the chance of them creating an expensive, low margin niche part like this (as sad as that is to say.)