I'm not keen to come back to 4e, but I'm going to by the Red Box Set to go with my other one. If it is excellent maybe I will buy some additional Essentials products but this is a long shot.
I was interested at first. However, the other day I took a long look at my gaming book shelves and realized that I have all the books with the words Dungeons & Dragons written on them to keep me happy for the rest of my gaming life.
I'm starting a new AD&D 1E campaign in two weeks.
EDIT: Okay, after the news coming out from GenCon, I'm changing my mind about Essentials. I now plan to get the "red box" and give it a try.