The HP touchpad was decent tablet. Not worth the original asking price, but the OS is great (only issue is it is a bit slow and a resource hog )
I bought a HP touch pad during the sale and I really like the webos. In terms of the UI and managing the use of multiple running programs, it easily beats android and iOS, it just takes less work to get to the programs you want and switch between them.
What made the touchpad fail was the high price, lack of a rear facing camera, horrid front facing camera, no powered USB host, no mini HDMI. The OS was sluggish and uses a lot of resources (over 400MB of memory used at startup just for the OS). The OS starts off being poorly configured, it logs everything which lags the OS further, it has annoying effects such as the ripple and other crap.
If the webOS booted as fast as android or the iOS, and had the requirements of the and memory usage of android, it would have been a real competitor.