Re. the copying:
Yep, it was originally announced that you'd be able to copy recorded content from the PS3, to view on PC, PSP, etc.
That feature has now been removed, although you can still use "Remote Play" to view on a PSP.
As for HD - As I said earlier in the original thread (now merged), it's not possible.
Freeview HD will use DVB-T2, while PlayTV is a DVB-T tuner.
http://www.eurogamer.net/article.php?article_id=212585