I honestly feel Steve Jobs just places targets and feels the need to jump ahead of them. His 2 targets, flash and blu-ray, are known for not having full support on his computers and/or iDevices.
To him it's really all business, and the opportunity to create a need for something different.
If Flash was great on a mobile device, there would be no need for the app store. So leaving it out, and then creating an outlet by having people create apps and he takes 30% is just shrewd business. In terms of Flash, it's pretty resource intensive, and he tried to move the industry to move onto things that are more efficient. So props to him on that.
Blu-ray?! Well until bandwidths can catch up, physical media will be here to stay. Also he doesn't want a format to eat into his iTunes HD money. Once again, nothing personal, it's just business. Downloads are the future, and I do take advantage of them more, but only as a secondary option.