what exactly is granting PS4 a better future than Vita ?

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Sony destroyed compititors 2 generations and dispite the numbers of mistake made by Sony ps3 still sold very well i mean by that Playstation had a huge fanbase.
Wii u flopped and xbox will loose this time the advantage of the 1 year and half and can't steal any big playstation exclusivity and they also loose the advantages of being a lot easier to develop compared to playstation.
Playstation seem to have a big support from 3rd party.
That's why it will doing far better then Vita.