Tornado Outbreak is a super fun idea/concept and it was handled very well in my opinion--the game is really good, and it doesn't really on motion controls! I had no issues rendering it at 4K / full speed (30fps) on my PC (see the specs and settings in the description). The main issue I had was the intros and FMVs having horizontal lines through them. The Dolphin Wiki mentions you can resolve this by enabling "Manual Texture Sampling" in the "Graphics Settings -> Advanced" menu. When I try that, it no longer boots the game (I seemed to remember trying this out once before for another game and had the same issue). Oh well, at least those horizontal lines don't appear during actual gameplay (that'd be annoying). Give this game a try if you've never played--it's a lot like those Katamari Damacy games on PlayStation consoles except with tornadoes! More 4K Wii testing still to come!