I think the reason people aren't talking that much about Wii MotionPlus is they really don't know what to expect ...
The first question a lot of people (probably) have is how well is it going to work. Obviously, Wii MotionPlus looks amazing in the videos and appears to live up to the expectations that people had for the original Wiimote but this doesn't mean that it will work this way in reality. On top of that questions about how many games will use it, how many games will require it, and whether it is going to lead to third party developers being more serious about their efforts on the will are also still unanswered.
Now, unlike what darthdevidem01 said, I don't think that Wii MotionPlus is a sign that "Wii Motion controlls weren't that great in the first place" anymore than new graphics-cards are a sign that the HD consoles weren't that great in the first place. Technology over the past several years has advanced to a point where they could improve upon their initial system at minimal cost to the user in such a way that developers would have the flexability to not use the new technology, to give the user the option to use it, or to require it for their games. I could be wrong but I expect Sony and Microsoft would also produce new addons to enhance their selling features if they could do it in such a painless way.
