I couldn't go back for anything. I simply couldn't. I have a fairly light and portable laptop with a 13" screen that I carry around from time to time, and it's a vastly more constrained computing experience.
Also, with the growing trend of 'cord-cutting' i think more and more people are hooking their laptops up to their TVs and watching netflix and youtube that way. Though the trend in that space seems to be pointing more toward curated ecosystems like roku, apple tv, etc.
But i think eventually for pretty much anything else the hardware and software will reach a point where you can dock your phone into some cradle and that will be your desktop environment also - this has been tried and failed many times, but its usually because the performance just isnt there to be competitive with real computers.
I have been doing this for some time now. My laptop hooked up to my TV serves me for gaming (helps that a lot of PC games support controllers now), consuming content and music all without being crippled by consumer hardware restrictions.
Mobile has replaced a lot of the way people spend time but for my interest and needs desktop is king. I don't watch movies on my desktop (YouTube yes) but I also don't do video editing and data science on a phone.