To explain further - there's a beauty in reduction and as the sensor becomes so high resolving and camera become more compact you might approach the concept of the ultimate MF "Q" camera.
Let's imagine for a second that the new IQ5 and mirrorless body are similarly compact than a TC, but finally sport a new EVF and and new AF lenses. The difference vs. the XT is that they have less shift, no tilt, etc.
So the new MF camera from Phase would be a camera that's compact, can be shot like the Fujis and Hassy's but is modular with the ability to slap it onto an Alpa or XT with all the benefits of stitching, movements and tilt.
Honestly - I am getting super excited about a modular mirrorless from P1 with huge EVF and available in mono and colour .... just slap a 40mm on it and you have truly the ultimate one lens camera.
And now to the reduction point - opportunity to shoot is more important than perfect lens choice or camera setup; ie with high resolution and ability to crop and keystone correct in post the huge advantage of such a 250 megapixel system is that precisely you don't need to bring along 5 lenses nor a tripod and as a result can be extremely nimble and fast on location - which can make a huge difference in terms of logistics. I'd take the new IQ5 XM 250-300 a lot more easily on a trip to a remote location than a full blown tripod tech cam kit, although the latter also has its raison d'etre. With higher megapixels and crop to compose it becomes less important though to use a tech cam as you can just do anything in post and still have 150 MPX ...
250-300 megapixels essentially means - shoot it and fix it later. Boom. Next shot. Boom. As time passes, you'll love to have just this one uber powerful mirrorless camera. Every large file becomes this canvas that you really can work on in post. Rotate, perspective correct, crop - boom still 120 megapixels, still printable 5 feet ...
Great times for P1 customers - it'll be the new benchmark system and if there's an EVF to a P1 back that's modular - count me in. A mirrorless system with detachable back - best of both worlds ... mono and colour ... compatible with XF, XM, XT, Alpa ...