I'm guessing a real refresh with that might come in 2016. We will get the force touch in the 15" rMBP this year, but I don't think we will get the new keyboard or any major design overhaul until Skylake, if not later. The Broadwell update is turning out to be turds on crackers and really kind of a joke with Intel's delays, so I think a lot of people are just going to sweep Broadwell under the rug and look towards a real update with Skylake, and that'd be a great time to do a full overhaul on the machines.
That wouldn't really be a great solution and would create more problems than it solves.
I wonder if a redesign would also mean an end to magsafe as well...
I just hope it's not with one USB-C port. For MBP, one port is too few IMHO.
Ugh!
Someone posted a couple sources saying Apple was definitely moving to Skylake during the summer for the MacBook Pro, so I'd imagine as with the Retina models, the 15" gets it first, maybe announced at WWDC, availability in July, and the 13" coming along later.
However, I think we might be in for a more comprehensive redesign if there's indeed one coming. I think this new 12" MacBook is the start of a new screen size lineup...12", 14", and 16". So perhaps a new 16" rMBP in the summer, with Skylake, USB C, and everything else, and then in the middle of fall, a scaled down 14" replacement for the current 13" rMBP. You could easily put an extra inch of screen size in the same footprint as the current machines, and so even if they wanted some bezel, the footprints wouldn't increase much if at all. Also, would probably be even thinner and lighter.
I have no idea if this will be the case, but hoping it will be. And then you can go with a ~3k screen on the 14" model and ~4k screen on the 16" model. A 16.something inch 4k MacBook Pro would be awesome. And totally doable.
As for the MacBook Air...who knows. Might be at the start of a slow death. And maybe a 14" MacBook will be coming when the MacBook moves to Skylake. That would make sense too. Of course, that still leaves a gap (5W processors vs. the 28W processors in the Pro line) in power, so who knows. Maybe there will be some name-changing. Hard to say.
14" is a definite.
16" on the other hand... I really never considered that possibility myself. To be honest, if the 16" is in the current size of the 15", I might actually consider it.
17" back in the cMBP days, on the other hand, was far too big.
I can't see them getting rid of the 15 and not going with both 14 and 16, since it's 15.4" and that's about as small as I could ever go in a laptop. I know lots of people also prefer the larger screen, and something that's only .7" larger than the current 13.3 is just not big enough. Also, many people did in fact love the 17 and have held on to theirs, hoping that Apple would release something similar. A 4k, 16" rMBP would be absolutely ideal for them. Hell, I'd buy one to replace my 2012 15" if it was only marginally wider and thinner/lighter.
I personally found the 17" cMBP was far too big and bulky. The 15", on the other hand, was a perfect blend of weight, size and performance.
Whenever the first iteration of Skylake is released. Most certainly not before 2016.