Hello guys. I've read a lot because I've been waiting the incoming like you for a long time (my 15" mbp is 10 years old now...). In this case, I want to buy the 13" version because I thing is the sweet spot between power and portability. BUT... it could change if Apple decides to skip 28w in order to decrease the laptop size and weight and increase its battery life. Dell for example has done that with its 13" xps and now it has a 15w Kaby Lake-U processor inside. The problem here is with the GPU, as we all know that 13" mbp only have iGPU. The differences between 28w models (iris 550) and 15w models (540, 520 or 620 with kabylake) are MASSIVE!! What do you think about?