On recent HD TVs that's true, but if you go back more than 2-3 years (or didn't buy a giant 55" set) then it's quite likely you'll have to resort to the AC adapter.
Which is exactly what they've accounted for here, and why they've given both options.
Re:Google Chromecast
by agildehaus on Wednesday July 24, 2013 @06:47PM
(#6099631)
The question is - do you have to resort to the AC adapter if you have one of the newer HDMI ports?
Re:Google Chromecast
by BHSPitMonkey on Wednesday July 24, 2013 @07:10PM
(#6099775)
The fine text on the linked page says "Power cord required" (emphasis mine).
It would be a bit messy but perhaps you could have it plugged into both at once and then you won't need an ungainly power cable to a socket.