For me, this would make the rMB an instant purchase for me
- Proper 1080p quality web cam (5MP+?)
- TouchID integration
- Edge-to-Edge screen (like XPS 13)
- 2 TB3 ports
I love the idea behind it and would even entertain a 13/14inch version of it. I do wonder if we can get a more powerful version of a processor while maintaining it being fanless, currently skylake 5w goes up to m7 which is 1.2ghz turboboosted up to 3.1? I wonder what will the future hold (with better heatsink technologies).
I think your #1 is quite likely, due to the fact of continued miniaturization of BSI CMOS and lens elements in smartphones; 720p is virtually a guarantee, and 1080p is definitely not out of the question (2MP is about the minimum in high-end smartphone front facing cameras these days). TouchID would be great, it all depends on how fast Apple wants touch ID and OLED bar to permeate through their lineup, I'm sure it will start at the high end (likely in the fall), so that's a good possibility as well. The 2 TB3 ports almost entirely depends on intel, there is no way Apple is going to put an additional chip for TB3 outside of the system chipset, there is simply no space on the logic board.
Edge to edge screen is not as likely, since there isn't really any practical reason to do it other than keeping the footprint of the MB small; if they decide to shrink the size of the 12' rMB slightly. There is a tiny bit more room on the side of the KB, so they mostly would have to take it from the depth, which means making the laptop an 11.0-11.6' 16x8 aspect ratio laptop; and eliminate the large speakers in that model to reduce the depth of the formfactor. If they go that route, then there would also likely be a 13.0 - 13.3' rMB model to complement it (and phasing out the MBA). This would actually be a pretty good idea. I think a 13.3" in a formfactor that is slightly larger than the current foot-print and slimmer bezels would drive the last few holdouts for the MBA to buy the new machines. And a 11.6" 16x9 formfactor take this into tablet territory in terms of size and weight, and easily makes the most competitive laptop in terms of portability on the market.
Anyways, rMBs are possibly the the most suitable laptop for about 90% of people on the market, with an unmatched design compared to pretty much any competitor. It probably is also the best designed product in Apple's inventory today.