From CNET:
Read more here:
http://reviews.cnet.com/tvs/sony-kdl-50r550a/4505-6475_7-35561978.html
LAS VEGAS--Sony's TV range for 2013 is smaller, some would say "more focused," than in years past, but the company is still including select innovations in even its midrange KDL-R550A series.
This TV plays well with others, namely satellite provider DirecTV and any (non-Apple, thank you very much) tablets and smartphones with near-field communication (NFC) capability. Its RVU (I looked, but I have no idea what that stands for) compliance means "DirecTV customers with the Genie Whole-Home HD DVR can access their set-top box, DVR, and on-demand services right from the KDL-R550A TV without the need for additional equipment." Sony assured me that DirecTV doesn't charge an additional fee, monthly or otherwise, for the TV to access the box.
Read more here:
http://reviews.cnet.com/tvs/sony-kdl-50r550a/4505-6475_7-35561978.html