"Gimmicky" in the sense that they used movement controls and that's non-standard in the industry and went away mostly afterwards. I'm considering anything that isn't a traditional stationary control (keyboard + mouse or controller) as "gimmicky" or out of the ordinary.
In terms of sales, you're absolutely right - the Wii crushed it. I'd be curious to know about usage and software sales though. Maybe I'm wrong (very possible), but almost everyone I knew had a Wii at some point, but they didn't use it outside of a family toy with a few games when they first got it. I'd still consider that a win for Nintendo compared to less sales, but I'd imagine the average Xbox 360 or PS3 had a lot more software sales per console.