WebOS will never gain traction because apps on it will always be much slower than native compiled apps on iOS or even JITed apps on Android.
It's that simple. No amount of buzzword compliance is going to change that.
Just look at this benchmark:
http://images.anandtech.com/graphs/graph4658/40733.png
The device/OS which relies on JavaScript performance for everything is the slowest when it comes to JavaScript performance. :) Even if they could 2-2.5x performance, it'd still be noticeably slower than iOS or Android.
Anyone who thinks people are buying these TouchPads because they think they're a viable product is delusional at best. People are buying them because they're $99, and $99 doesn't buy you much these days.