Well you still need to buy a Z3, which is a lot more expensive than a Vita. If I already have a phone I'm happy with, but want remote play then Vita is the best option. But the only way to save Vita is with Vita only games. Vita cannot survive as a PS4 appendage or a vehicle for PS Now.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix