I've watched every season of TAR and every season I keep telling myself "Surely, the next season will be in HD!" and then we get nothing.
I do like the new title graphics (with updated theme song that they surprisingly didn't destroy -- TV show creators seem to have a passion for fixing things that aren't broken) and the side-by-side shots during scene transitions. But I still have to ask, why, WHY they didn't take this opportunity to go hi-def since they updated the in-game graphics etc. Oh well.
I will say, though, that the 5.1 sound this season sounds A LOT different than past seasons' did. This season the music and SFX actually make good natural use of the rear channels with proper sound discretion, while past seasons tended to over-use the rears and it didn't blend in properly (that and the racers' voices would come out of all speakers for no apparent reason).
Sony XBR-52HX909, Panasonic DMP-BD60, NextBox 2.0 Cisco 8642 Whole Home PVR, Pioneer VSX-919AH 7.1, Logitech Harmony 785