I was fully "in" on webOS :( Still got a Palm Pre, Pre 2, Pre 3 and TouchPad in a box, and an LG webOS 2.0 OLED that died in the basement. Apps were built sort of like PhoneGap, but intentional and supported rather than a middleware work-around. webOS introduced the card concept that we all use now, along with a very coherent design language, and the devices were cool (to me, albeit a bit flimsy) with full keyboards…
I had multiple friends end up buying the Pre and the non-slidey Pre (I can't remember the name) because they saw what I had thought it was so cool.
Now my LG TV runs WebOS, which I assume is the name with no shared code, but who knows.