So basically WebOS had it right, we just weren’t ready for the future?
webOS got an awful lot of things right, but its failure in the marketplace was a logical outcome given its poor performance and insanely inept management and marketing. I really wish it had succeeded, but I’m also quite happy just to see its UI paradigms showing up in iPhone, Windows Phone, Android, and, as you rightly point out here, normal websites.
I think you mean Hypercard. ;)
cards lend themselves better to gestures, which is one of the main advantages of touch screen displays