The new unified look is currently launched in the UK on Sky Arts and on the Sky Sport channels in Italy. Sky Sports UK will probably be next to use the branding, its new logo has appeared in a Premier League advert and on the Sky homepage so far.
One thing I HAVE noticed, if this makes any sense, is that on Sky Sports HD, the motion and the image on screen seems a lot more....fluid? Adverts, live action, graphics, promos, studio shots... I noticed it on two separate screens this weekend on two separate channels (SS1 HD and SS3 HD) - one screen a Samsung 60" and another an LG 28".