I have a Galaxy S7 smartphone (and Gear S2 Classic 4G watch) but I'm old fashioned and prefer to do any serious work or surfing on a Windows PC. I do own a couple of tablets, but to me they're neither fish nor fowl and just a niche product. I find that a tablet that's small enough to carry around is not much more usable as a general purpose computer than my smartphone. On the other hand, a tablet large enough to get near the functionality of a laptop weighs almost as much as my Razer Blade Stealth Ultrabook - but without of the convenience of the Stealth's built in keyboard. As a result most of my writing and surfing gets done from my laptop - either with its builtin 12.5" 4k screen or docked with a Dell P2415 24" 4K monitor. The only thing that I like using a tablet for is as an ereader, either for books, e-magazines, or news agrigation sites, or to watch videos .
I've never enjoyed gaming with a smartphone and I've only found a couple of games that I enjoy on a tablet and those got old fast. My desktop PC is nothing special, just a 5th gen i5 running Windows 10 with the help of a GTX-960, 16GB of RAM, an SSD and three Dell 1080P monitors. It's no rocket but it plays all of the games that I want to play at full speed on the center 27" monitor).
I have more computers. My home server runs Windows 7, and my two HTPCs (an Intel NUC and a Gigabyte Brix) run Windows 10.