Apple has enough resources to tackle many product markets at once yet they have a smaller number of products than every single company they compete against - most of those companies a fraction of their size. They could easily release 30 different Macs per year but choose not to. Jobs put a stop to that when he came back to Apple and they haven't really veered from that course since. I think the writing is on the wall for Macs and any other products that Apple seems to neglect. They can't come out and say they see no future for the Mac but it's fairly obvious that they want mobile devices like iPad pro to completely cannibalize Mac sales in 5-10 years. It's also fairly obvious that the entire PC market will follow suit.
I just don't see it. The death of the traditional PC / laptop has been talked about for years and has yet to materialize. The iPad Pro and it's ilk are just still far too limited to decimate standard desktop / laptop sales by that kind of margin in the timeframes you're talking about.