No, that's not the next-generation Fujifilm X-T1. This is an entirely new system camera called GFX featuring a massive 43.8 x32.9mm, 51-megapixel medium format sensor. The camera takes on the market with a lighter overall body and a more portable design. It also has a removable viewfinder that can be swapped out with an external monitor and can be equipped with a variety of accessories.
Launching in 2017, the GFX will be available with six lenses: a GF63mmF2.8 R WR standard prime, GF32-64mmF4 R LM WR wide-angle standard zoom, GF120mmF4 Macro R LM OIS WR mid-telephoto macro, GF110mmF2 R LM WR mid-telephoto with fast aperture, GF23mmF4 R LM WR ultra-wide, and a GF45mmF2.8 R WR wide.