>>3731010They wont. Their x-mount lenses wont cover a FF sensor. Their MF cameras/lenses are nice, but really only match the performance of the FF bodies from other manufacturers. You'd be better off just buying a FF mirrorless from someone else.
If you are coming from Canon and want mirrorless, you best bet is Canon's new mirrorless or Sony. You will be able to autofocus your old EF-mount lenses with either of those two mounts. It helps smooth the transition to mirrorless. Plus some lenses don't quite have mirrorless equivalents yet.
Personally I am not a fan of the x-trans sensor. It is really a step backwards in pretty much every way. When Fuji starts putting bayer sensors into their cameras again they will be worth a look.