It’s probably telling that with my laptop less than three meters away, and my tablet’s keyboard/mouse more like seven meters away; I opted to go with the tablet approach.

For sitting on my couch: tablets are generally an ideal formfactor. For being at a desk often the lure of a large keyboard and an even larger display is hard to pass out. But there are times where I’d rather be at my couch just like there are times I would rather be at my desk.
Generally, I’ve found that my laptop and desktop aren’t devices I reach for as often for their form factor as I do for the ease of using an X-Terminal, or simply doing things on it through a glorified X-Terminal and associated trappings. Or for very specialized tasks: because good luck cramming a massive GTX into a tablet, lol.