Nah, Sony have FF in small package covered with the A7 and forthcoming A9 series. I've got nothing against Fuji producing a FF --- sure, go for it. But, I *really* hope they make a portable MF too.
See, what is absolutely missing from the market is MF sensor in small(ish) mirrorless format. It's not a matter of competing with the existing MF market. It's about creating a new market segment at a lower price point, stripped down to the basics in terms of interface and functions and, most of all ... portable. I'm imagining a mirrorless MF camera that is smaller and lighter than a typical full-frame DSLR. There were (and still are) analogue MF range finders. Superb cameras that produce images that make even leicas weep with envy, which you can actually carry around all day with no problem. Seriously, I would LOVE it if Fuji could make such a camera. I'd even buy one with no freaking screen on the back if that helped keep costs and weight down (I know, crazy, but actually not being able to check every shot immediately makes me a WAY better photographer).
Strip it down:
- manual focus only
- manual aperture control on the lens itself
- no screen (!) OK nobody else would probably buy this :-)
- a killer f/4 lens at 35mm FF equivalent (that's a 55mm on a 6x6 MF) ... trust me that's fast enough
- a BIG viewfinder like on a real MF camera