With how much % marketshare ? I don't mean to be snarky but that question is essential to drive home the point on WebOS's current irrelevancy however good or superior it is as a software platform in vacuum. Software is meant to be used & despite all its shortcomings, marketshare is as good a metric as we'll ever get to measure an ecosystem's health. WebOs fails that test.
And as soon as they get the Galaxy Nexus port into a state that's stable enough to be a daily driver I'm going to pick one up. Until then I'll be sticking with my Pre2.
Sure if you look at the demos, and quickly read the docs all is fine and dandy. But did you try at least to code something with that junk? I did, and wasn't pretty. JS as currently stands is not mature enough to support something complex as an UI kit. Let's see if the next iteration takes us there, and then maybe Enyo can live up to our expectations.