There may be one other significant difference here that we are overlooking.
As I have read and listened to the AOPA & EAA videos, you still will not be able to fly an airplane exceeding 1320 lbs (( and all the other LSA requirements )) with just a Sport Pilot license.
To fly the aircraft envisioned in by AOPA and EAA you will need at least a Private Pilots license - the only change is for the medical.
This will probably protect the LSA manufactures to some extent.
Certainly the cost for getting the Private is about twice what the Sport Pilot license costs.
As I read it - to fly the 150 with a Sport Pilots license will not be legal because the airplane does not "fit" into that category.
I hope their efforts are successful. I have even written my Senator and asked him to develop legislation to do away with the third class medical in favor of the driver's license medical. Surely he could slip a "rider" on an existing bill and get it thru Congress.
Still holding my breath.

Rodney