I'll never stop emulating! You can't take it from me! (Because Virtual Console is technically emulation, you know?)
Massive amounts of re-releases of older games on newer systems (ala Virtual Console) is a good step towards stopping non-official emulation, and maybe even taking steps for advanced emulation would help too. For example, if the Wii U received Gamecube Virtual Console games, that would be good. But if they did Dolphin-style HD-resolution emulation, that would be even better! This all relies on their ability to do something like this, though, and making it bug-free is a big issue too.