I've looked at MIPS and Wavecell helmets for bicycling. When I looked at the analysis and research, it seemed that MIPS makes more sense for snow sports, where your helmet can get stuck in snow and twist. On asphalt, or when colliding with a car, this is less likely. So I passed on getting a MIPS helmet for biking (though I should probably get one for snowboarding).

When I looked at the literature on Wavecell, it seemed to be of the "up to 40x better" variety. To a lay person like myself, that seemed suspicious because I have no idea what the common accident types are, and the literature didn't seem to indicate that it was more protective in the common scenarios. The article linked here does seem to make that case, but as others have noted it reads a bit like an advertisement.

I am actually planning on getting on getting one of these helmets simply because its shape fits my head very well, and in talking with cyclists I've been told that having a shape that fits your head (mine is apparently more "circular" than "oblong") is the most important thing.