Originally Posted by gino_76ph 
not 720p? so, that means same as normal freeview?
Well, if it was 720p it'd be HD ! And Sky HD is a separate service, so...
A few of the channels (on both services) are actually slightly wonky resolutions, not even proper 576i !
Sky HD is 1080i on the HD channels, and with a decent TV that deinterlaces properly, it looks rather impressive. Many people would struggle to tell the difference between broadcast 1080i (properly processed) and 1080p anyway.
Good BeebHD transmissions can often eclipse fair to middling Blu-Rays for PQ. Indeed, I have a few clips on my HD box from the early (high bitrate) days of BBCHD which are my demo fodder of choice !