Currently Vita is my go-to portable emulator, and prolly will be for a while yet. But even toaster can run 8-32 bit consoles nowdays. How about PSP? Dreamcast? GC/Wii? Or maybe even almighty ultrarich PS2 library? I know WiiU can run PSP fluid enough, so switch will prolly too. But what else? Switch's hardware is no enigma, so I guess those who familiar with tablet hardware can already tell what to expect.