In longe terms?
I know, and this was, some posts ago, my critique to Oppenheim vision "MBP with only USB-C".
With MacBook Air, Apple get rid of a lot of heavy stuff, and went for flash and SSD.
With Retina the same, no DVD, which was one of the bulky part of the hardware.
With the current MacBook, no fans, still bulky for a ultra-slimmer laptop, and shrink of the logicboard.
But with next MBP, what will they eliminate?

Which of this parts?
The only one that looks bulky to me, except for the fans, is the new force trackpad...
I'll make more clear my doubt: rumors say that new MBP is coming shaped like the MBA.
So basically, how is possible to stuff the power of the MBP inside the MBA?
And I'm aware that Apple has never made portable workstation like the beasts of Dell or HP, and neither I want one of those computers. I'm just asking for a reasonably powerful laptop. And that it's not a MBA.