Startups generally don't have the luxury of cash reserves that Apple has. Apple can afford to be patient and release things when they are ready. Startups usually cannot.
Yeah. There's also just a huge amount of boilerplate HTML an CSS you need when you start a project, it would be great to be able to leap frog some or all of that.
Great idea for an eBook. As a developer without a design background, it would be really handy to know the basics so I could bootstrap things without having to bring in a real designer early on in a project.
Yeah, and there's always someone in April who's on pace to hit 80 home runs for the season. That said, I think the trend toward Chrome, and webkit browsers in general, is undeniable.