Useless because of DPI scaling issues or other?
I love the MacBooks i've used that have 1600p on as small as 13" screens.
Agreed on scaling making things better. My laptop has a 14 inch screen (3200x1800 - Razer Blade 2014) and it's really great. But on the DPI scaling issue - if I have 150% scaling in Windows 8.1 I have to turn that to 100% and log out and back in, in order for my mouse cursor to appear in certain games (e.g., SC2 - HoTS).
Aside from that specific issue, I can't wait for something like a 4/5k screen, around 27/30 inch, 120hz - but I might be waiting a long time for something like that.