Great idea, would this be possible? I can create some great skins in HTML, CSS....
I had this idea several times in my head but in my opinion this isn't really possible.
Even with HTML 5 there will no real standard codecs be implemented in the browsers.
Every browser uses its own codecs and every browser can only show some specific types of videos.
Even the audio playback isn't really standardized. So some browser are natively capable of mp3 some can only play ogg.
Furthermore every browser has its own implementation standards.
Furthermore it makes it much more complicated to create a great user experience when using a remote or when you want to use it as a real htpc software.
Browser based media coverage is perhaps cool on a desktop pc but not for a htpc. Even if I really like the idea of having everything in my brother.
I'm a Java Web Developer and I thought sometime about it but even if I would have the technical possibilities (without different browser problems etc.) I wouldn't have the time