Do you think in the next 3 years Ps vita will run on android devices?

[fivefeet8]

Emulating the A9 CPU instructions could be easier comparatively to a totally different architecture, but you'd still have to emulate the various peripheral devices and video processor. And if you want the CPU emulation to be portable to different devices instead of only ARM devices, then you lose that anyways.

The Vita's GPU is designed by Imagine Tech which renders quite differently than the current slew of Adreno/Tegra GPU's in current Android devices. Apple devices currently use Imagine Tech GPU's quite a bit, but their CPU is different enough that it would lose the advantage of the having a similar CPU.

It's probably going to take a while for some knowledgable programmers to get a Vita emulator up to the levels of PPSSPP. Look at the original Xbox. It's got basically a Pentium 3 processor with an Nvidia Geforce 3 GPU, but it's still not emulated anywhere near decent today. There's a huge lack of interest by emulator authors for some console systems and that's also why it takes so long. I'm still waiting for a decent portable Sega Saturn emulator on Android.