Why can't advertisements be genius?

Okay, iTunes Genius is brilliant. I'm constantly amazed at the excellent songs it pairs up. It's all I listen to now. I pick a song I'm in the mood for and just jam out.

Why can't advertising be as smart as iTunes Genius? Is there not some way to leverage this?

Here's a commercial I like for a product I would buy. Now show me more! I know this happens a little bit, mainly on the internet. Television needs to catch up. I'm so much happier influencing my surroundings. A commercial break tailored to me? I might actually watch that. (I also may be a little bias.)