A full frame Panasonic is interesting but that is just a rumor.
At this point Fuji gives me everything I want. Color, 10 bit, 4k 60p, APSC, auto focus, decent low light, dynamic range.
Sony never delivers on color, even if they do give us 10 bit (A7000 betting on)(probably not full frame 10 bit)
Canon just doesn't deliver anything competitive.
Panasonic refuses to give phase detect auto focus and is M43.
I see myself being happy with the XT3 for a long time. 422 and 420 won't be noticeably different like 8 bit to 10 bit is.