make a emulator of handheld with a 7 or 8 years old tech is not something impressive we should wait another 8 years to having a psvita emulator nobody will not buying a vita and wait an emulator of it in smartphone many years.
Handheld is not dead
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m







