More consumers than creators
Phones and tablets are consumption devices and more people consume media than create it. I find a tablet handy to have when I just need a limited device to check email, look up information on the web or do a very small amount of work online. I use a full notebook or desktop when I need to get real work done. Typing on a bespoke keyboard is so far superior to trying to hack out words on a membrane pad connected to a tablet that it can't even be adequately described. Processing photos photos on anything short of my full desktop is torture (real RAW images from a proper camera, not selfies from a phone). I doubt that CAD will ever be very pleasant or efficient to do on a fondleslab. It used to be that there wasn't a choice. An inexpensive laptop was the bottom of the line and a comparable desktop would have been half the price.