L135M

I much prefer the stills output of Fuji over Panasonic. I much prefer the movie output of Panasonic - hence I run 2 systems. GX8 looks nice but the stills output (judging by samples available on the web) won't persuade me to sell my Fuji gear.
 
Regarding the comments above re: MFT bodies not being that much smaller than Sony FF.... that is no longer the point. It's all about lens size - there is a massive difference in size/ weight terms between a MFT set of lenses and a FF set (of "equivalent" focal lengths/ max aperture). My shoulders will gladly testify to this (as a previous FF shooter). There's even an appreciable difference between APS-C and MFT when it comes to lens size/ weight.

Panasonic and Olympus have both heavily invested into the 4/3 and m4/3 systems, and even now they are still struggling to keep their head out of the water.
 
The format clearly saved Olympus from banrukpcy some years ago but nowadays where the mirrorless is getting more common and we have Sony landing with their A7 series, you almost don't have to compromise between camera size and sensor anymore.
 
The X-T1 (440g) is lighter than the OM-D E-M5 MkII (496g) and the A7RII (625g) is not that much heavier and has no compromise on the IQ. With every new advance of the larger sensor in the mirrorless world the 4/3 system dies a bit, the last bastion that holds them up is really that ocean of lenses, many of them are great primes.

Not ‘instead of’: Fuji employs Sony sensors (custom versions with X-Trans rather than Bayer CFA array) now and will probably continue to do so in the future. Just with sensors based on whatever is state-of-the-art then. Scaling down the full sensor resolution to obtain a HD or 4K video stream is always tricky and the X-Trans pattern doesn’t make this any easier. Sony did choose a 42 rather than 50 MP sensor for the Alpha 7R II just to simplify creating video images – the CFA pattern is just one factor to be considered.