Shifting of Interbike is seriously an inward looking idea from the organisers imo.
Reno isn't the easiest place to connect to for visitors outside of the continental USA. Whereas Vegas has quite a lot of direct international connections. I sure hope the organisers have looked at this.
As for Taipei, its a different kind of bike show as opposed to Interbike. Its more of a mid-way between Interbike and Eurobike in terms of outlook. As it caters to both small scale sourcers as well as big scale manufacturers. Interbike and Eurobike being of the two extremes mostly.