Well, it looks like you'll be able to buy pbooks (and other products) via Fire TV and Fire TV stick. If you have the voice remote, you'll be able to do so via voice commands:
http://www.aftvnews.com/exclusive-sh...ick/#more-7668
The "feature" is part of the firmware update being deployed now but apparently won't be activated until Prime Day, July 15.
Can't say it's a surprise.