I'm still using my MBA 11" from 2012 for everything. I have only 4GB RAM and it's not even a problem to work (I don't have 15 VMs running in background). :)) I have no idea when I'm going to change it and for what, but I have absolutely no desire to move back to Windows or Ubuntu.
And there is no way I move away from iOS. It works great for me. Plus, I use my iPhone 6 mostly for gaming and I've been buying games since the 3GS so I've a huge collection (including a bunch of Final Fantasy and Dragon Quest titles that are quite expensive).
As far as mobile goes, I've actually seen an increase in people moving back to iOS from Android.
This is a decades-long reflection on computer history as a whole, having Apple as protagonist and important player.
The title reflects where the early-adopters - the same people that brought Apple back from the dead in the late 90's - will go from here.