You guys are forgetting that the
current 6.x devices also carry the Windows Phone brand.
There shouldn't be much confusion as, like Windows CE, PocketPC/Phone, and Windows Mobile before it, Windows Phone is a background brand signifying the base platform, not available featureset.
To the general public, it has minimal impact. The brands seen by them will be ODM or carrier brands as always.
People will be buying a Kin, not a Windows Phone.
Similarly, with Windows Phone 7 (and 8 and 9...), people will be buying an HTC X or T-Mobile Y. Windows Phone will just be a small logo on the box, boot screen, and back of the device -- cool for us that pay attention and like devices built on Windows, but
it sadly hasn't been widely effective in itself at getting non-geeks to not call my PocketPC a Palm, or realize their Windows Mobile phone w/ slideout keyboard isn't a Blackberry.