Sony's handheld history: There are two generations of handhelds, PSP and PSV.
The first generation of handhelds: PSP. The order of development is that the PSP1000→ PSP2000→ the PSPGO → the PSP3000→ the PSP E1000, of which the PSP E1000 is a scaled-down version of the European region, and the Asian region does not.
The second generation of handhelds: PSV, the order of development is, PSV1000→ PSV2000
The third generation of handhelds, Sony can not be launched, because Nintendo has fully occupied 99.99% of the handheld market share.