I suspect this will get down to legal semantics.
Yes IE won`t be installed as supplied, but the actual install .exe will be on the desktop or in the initial setup.
So given that most people don`t have much idea of what to do they`ll follow the nice instructions on how to install a browser that M$ have kindly included, but not installed so giving people a choice..."Click Here!!!"
I can see this not actually achieving much in any way.
Personally, I believe all PCs should come without any O/S & during purchase they should be allowed to chose what they want & have the shop install it for them or for those technically capable let them install it, for most Linux would be enough. I wonder how many will select Linux..Its free...Windows it`ll cost you £`s