Always less than pc world. Remember this is probably only for this year.
classic MacBook pro will die, you will have Air, Pro (retina) maybe also in 13".
Not necessarily. If the classic MBP 13" outsells the MBA 13" 2:1 and the MBA 13" sells about 1:1 to the hiDPI MBP 13" then it is the MBA that will likely die.
It would irrational for Apple to kill off the product that more customers wanted. Especially now that they (MBP 13" and MBA 13") are at the exact same price. This is a test as to what users prefer. If there are significant people who want the extra sockets and the DVD drive then it will live on.
A hiDPI MBP 13" is likely to be quite close to the MBA 13" on weight and size. (perhaps if they strip off 1.1lbs (-25%) , 3.4lbs versus the MBA's 2.9lbs ). It probably won't be tapered like the MBA 13" because it will need the extra battery capacity inside. But that's the catch 22. The MBA 13" can't compete with either the additional graphics and/or batteries that a slightly slimmed down MBP 13" would have that the hiDPI graphics demand.
The two with the fewest differences between them are the two slimmed down models. The could end up with the exact same side sockets and the major difference is that the hiDPI model has the much better screen and much better processor. The only marginally significant physical thing the MBA 13" would have is 0.5lbs lower weight advantage (-15%). That's about it. The major outstanding difference would be the price.
But the MBP 13" shares that same price advantage and is substantively more different and sells into to a
larger user base.
In that context, I'm not sure why Apple would keep those two with "maximized thinness" models.
If it turns out the MBA 13" outsells the MBP 13" 2:1 (and both significantly outselling the hiDPI model ) then I could see the justification. Even more so if Apple can't strip off 25% of the weight. If they get more weight than that then it gets fuzzy again. However, even at 1:1 ratio with the MBA, the MBP 13" has advantages.
The ones you see today with super drive are just for the transition.
Apple thinks they are the transition. But if the customers vote with their pocketbooks that DVD and edge sockets are more valuable to them Apple will probably move along a longer transition. The MBA would go away first and then when Apple can make flash storage sizes bigger at more affordable prices, Thunderbolt docks/dongles get cheaper, 802.11ac takes wider spread hold, Intel delivers a one-Chip solution for CPU/GPU/I-Ohub (so maybe allows for discrete GPU), and the hiDPI gets cheaper .... then wipe the MBP 13".
As long as the hiDPI screen remain substantially more expensive it is really a battle between the MBA 13" and MBP 13" as to which one customers want more. I suspect it is going to be the MBP 13". Largely because the MBP 13" hiDPI model it going to snare more of the folks chasing Apple's 'future' than the reduced in price MBA 13" will.
I think the MBA has always had "too many" compromises. Apple is incrementally giving back on those. Two USB sockets , because one was not enough. Next will the the gratuitous taper to kill battery space just to snag some 0.11" edge number on one side. When it becomes battery space to support revolutionary new screen versus some "world's thinnest" title they lost years ago .... I think the taper will loose.