Too freakin' cool! The Roku has just become my perfect streamer, with full-featured (well, mostly) versions of Netflix, Amazon, VUDU, Hulu Plus and HBO Go. (I say "mostly" because Netflix players on other devices have superior search--with separate people-name and title results, superior episode browsing, with a season selection instead of a monolithic list of all episodes and that new automatic next-television-episode start that I'm not sure that I actually like).
It no doubt requires a downstream device--AVR, television, etc--capable of decoding Dolby Plus; I did not notice an option for stereo sound like Netflix so it might require a DD+ decoding AVR for use, period (although there are some VUDU titles with basic DD 5.1 and DD 2.1 sound; some with different sound for SD, HD and HDX).
The cherry on the top is the $6 credit for registration of a new HDX-capable device