I thought the normal Netflix watch on demand didn't HD......
I would assume you could still use marketplace because why would they stop a service they can also profit from.......Were talking about Microsoft....lol.......Besides Netflix being a good feature for the 360, Microsoft probably makes a percentage from the signups from Xbox Live customers........
Some movies won't be on streaming Netflix but will be on marketplace......if I wanted to watch a paticular movie and it was on marketplace, even if I get the netflix soon then I would just rent it from the marketplace