Unlikely. A 100W TDP would mean that it would not be possible to run the laptop for any more than an hour at full load (on battery) or it would draw from both the wall and battery with their current power designs at full load. Also, That would be insane to cool in a MBP format (that's about 2x the thermal output of the current 15").

The Surface Book has a full-bore NVidia GTX 1060 in it. It cannot charge while the 1060 is going 100% in a modern AAA video game (yes: it uses up so much power, that if you plug it into the wall-outlet and game, you are LOSING power).

GPUs use up tons of power, but 99% of the time they sit around and are "off". There's no need to turn on the GPU when browsing Facebook, and modern Win10 can keep the graphics card off.

Anyway, 100W TDP is perfectly acceptable for laptops, as long as this is a "worst case" TDP. Besides, gamers do want to game, and many are willing to accept bad battery life for the ability to run Witcher 3 or Tomb Raider on the go.

No one will push a laptop to full load on a battery. Apple can pretty much throttle power on battery mode and no one will complain. As for the wall charger, the design can be changed. Alienwares with gtx 1070 can go upto 115w tdp with AC adapters without any problem. As for cooling, Asus ROG Zephyrus cools a gtx 1080 with a size comparable to macbook pro.

Yeah sure, this chip makes sense for other laptops, just not the mbp.

This statement is incorrect, 15" designs handle the 100W TDP just fine. Look at the Dell XPS 15 - it has an Intel H-series CPU (45W) plus a 1050 GPU (55W). While having all this power, it's slim and the cooling solution works OK under load (less reports about thermal throttling than latest MBP has) and with a 130W power brick it can be powered no problem unxer full load.