I sit on a reclining desk chair, about 4 feet back from a 46" TV. I have a lap desk with a bluetooth keyboard and trackpad. Love it! I'm interested in trying this out, to be able to have a bigger screen, and to be able to take it anywhere.
That sounds fun. I do that from time to time, but it gets fumbly for me. You must have a better chair (or keyboard) if it's working for you. Also.. my TV isn't nearly 4k (or even 2k)
I did pick up a nice chair when some nearby offices were being vacated a couple years ago. I have used a decade-old Apple BT keyboard and trackpad. They're great (though the batteries have to be changed every month or so). My TV is 1080p, and I wish it were a bit higher resolution, for sure.