На этот вопрос пытается ответить Дилгер:

There is nothing about the webOS that suggests it was intended to scale beyond the small screen of smartphones like the Pre, yet analysts are already fantasizing that HP will drop Windows 7 to create a webOS-powered tablet. Why is that? Because they think that if Apple could manage that, anyone can. Just like everyone successfully copied the iPod and the iPhone and the App Store and everything else Apple’s done. Oh wait, no that didn’t ever happen at all.