When Jobs introduced the iPhone, it was clear that the platform they could not afford to ignore was web developers - however closed the platform was, having a crippled web browser was not an option. Jobs confirmed that today by saying that the SDK for iPhone applications was Web 2.0 Internet standards
Web 2.0 + Ajax. Jobs also announced Safari 3 for Windows, so Webkit is now a platform that runs on all computers and a lot of phones.
This is another step in the Innovators Dilemma disruption of the PC computing platform by web-based applications, where learning lessons from the web, and reusing others work are important principles.