HDMI 1.3 just gives you support for more audio and video formats. On the audio side I believe it allows for codecs like DTSHD MA and on the video side, it includes support for deep color. If your player does your audio decoding ( PS3 can do this ), you don't need 1.3 to get lossless audio on your receiver if it processes audio over HDMI. You don't need 1.3 on your tv/projector if you don't care about deep color which is an unknown at this point anyway (no content currently using it). It would be smart to buy any new equipment with 1.3 support to help prolong your investment but it's hardly a requirement at the moment depending on your setup and whether you care about lossless audio or not.