It failed for a couple other important reasons too. A web desktop is an anti-pattern. With my current OS I can already open a web browser fullscreen and access web apps on the internet. And I can also do other things like attach peripherals, copy my music and pictures, use photoshop and desktop publishing. I don't gain anything by abandoning my current OS and restrict myself to web apps. There never was any killer apps for WebOS, or any real reason to switch.