Google TV is about to get a lot more useful, starting today and continuing over the next few days, Google is rolling out a Play Store update to Google TV. The update adds support to buy/rent Play Movies, TV shows and Play Music directly from your Google TV device.  Purchases/rentals made on other devices will also automatically be available on your Google TV.  Other features such as auto-updates, app subscriptions and smart updates were added.

Via: Droid-Life | Source: Google TV Blog