4K, 8K useful for the home? What pixel density do you game at.

[Hynad]

What I wish to get is 300dpi on a 32". I use a 1080p 32" as a PC monitor, on which I draw on Painter and Photoshop. So the added pixel density would be Godsent to me.

OP: 43.2 at roughly 3 feets away from a 32"...  I think your formulae is erroneous.