I don’t want to buy a new MBP now in case one with a touch screen might come out, but does anyone have a guess as to whether or not that might really happen?
All anybody can offer on this is speculation...
As such - Apple's "current wisdom" has always been that a touchscreen doesn't work ergonomically on a laptop or desktop because it would be uncomfortable to continually reach over the keyboard ("gorilla arms" syndrome) and that an operating system needs to be optimised for either touch (iOS) or pointer (Mac OS) and can't be both.
I think there's a lot of validity in that - plus I expect Apple will be sticking to that policy until the day they announce a touch-screen Mac. The workaround to "gorilla arms" is to produce some sort of convertible/hybrid such as Microsofts Surface/Surface Book/Surface Studio range. I doubt that Apple would do
that anytime soon because it would self-compete with the iPad range, and all the smoke signals from Apple at the moment is that (sadly) they're far more enthusiastic about the iPad than the Mac.
So, if I had to guess, I'd say "don't hold your breath" - meanwhile, Adobe
has already announced "full" Photoshop CC for iPad so I'd suggest that its marginally more likely that the other CC apps will appear on iPad first.
What
might prove me wrong is Apple's "Project Marzipan" - running iOS Apps on the Mac - and although I'm assuming that will include some sort of translation layer between pointer and touch it
could be the incentive for Apple to stick a touchscreen on the Mac.
NB: Don't shoot the messenger - pretty much every laptop or all-in-one comparable to the Mac includes a touchscreen so IMO Apple should stop faffing around, stick one on and let the users worry about their gorilla arms and greasy fingers. Or, let us run MacOS on the iPad Pro... the last batch of iPads released in October would be
far more interesting than the ~Meh Mini or MacBook Meh if only they weren't knobbled with iOS.