I think that if hypercard had been the engine of the web instead of html/css, we would have had the current state of the web (ie. with client-side dynamic applications) a lot sooner.
Wether Hypertalk would have been a better choice than javascript to program the web, this is another story :)
For the curious, the Hypertalk entry in wikipedia contains a lot of code examples: https://en.wikipedia.org/wiki/HyperTalk