Anyway, I totally agree with you OP. People, including myself, got spoiled with smartphone screens. But then, they forgot that even if it's 5 or 6 inch, a 1080p or 1440p screen ask as much power horse than if it was 40 or 50 inch.
Higher DPI in spite of low res (like 480p or 540p) has been the trick for small screens to look like HD screens you find in your house.
But nowadays, it only has been a race from manufacturers to get buzz words.
If your PS4 can't maintain 1080p on some titles, why would you expect a handheld to do so ?
Also, a common mistake from people playing on their smartphones or tablet is that their games runs at native res. It's not true.
I'd take a great exemple: Trine 2.
A 2D game, which had an Android version, developped by the original developpers, to run on Tegra K1 on Shield Tablet, the most powerful actual SoC, which is claimed to be better than PS360 on paper.
The truth ? It runs at 1024x768 (Shield Tablet screen is 1920x1200), with slightly lower graphics than PS360 version and with a slightly lower framerate.
Mobile tech has 3 constraint today:
1) They're limited in size and tech: They have to fit in a device that fit in your pocket.
2) They're limited in term of TDP and power consumption: They need to run without a fan; without boiling and without eating your battery in 50 minutes
3) They're limited in term of bandwith: Memory is too slow.
All I'll say is that more and more people are moving to mobile and when even mid tier phones blow your specs out of the water than maybe it's time to try a little harder to get noticed.
Have you read the OP ? Yes, in 2017, even mid tier phone will use 1080p screens.. so ?