That's a mistake, Microsoft Corp. (Nasdaq: MSFT) says: The IPTV choices aren't supposed to be visible yet. The official word: IPTV for the Xbox 360 rolls out to service providers by the end of this year. The providers will then decide when to start deploying Xbox 360s with Microsoft's Mediaroom IPTV platform installed.
Xboxic reiterates the story, which broke on Xbox 360 Fanboy, but the comments add this amusing exchange (spelling/punctuation corrected):
"When is the fall update coming out anyway?"
"In the spring."