"The D&D Lair Assault program is designed for players looking for more complex, strategic, and highly tactical challenges. The D&D Lair Assault program is tailored to groups of players who enjoy solving tactical puzzles, optimizing characters, and using rules to their advantage. Each D&D Lair Assault challenge features complex encounters prepared in advance by the Dungeon Master. Players are then pitted against their DM in an attempt to solve highly customized and creative challenges."
That is from here. I found out about it at Geek Related. Here is the official Wizards of the Coast announcement from a few days ago.
I almost wish I hadn't read any of it. There is so much to be disturbed about in the above statement that I won't even go into it. I will say that I don't understand the people at WotC that are currently in charge of Dungeons & Dragons. On the one hand they almost acknowledge that 4e is going in the wrong direction and attempt to right the course by releasing Essential. Then on the other hand they go and release their ridiculous collectible cards and now they are doing this.
Congratulations Wizards of the Coast you are now managing to piss off and alienate even the 4e crowd. Maybe they figured they had pissed off fans of every other edition so they might as well go for the complete set. Not all of those who play 4th edition are pissed of course, some really like the sound of this. But is it really a good idea to fracture your market yet again? It just doesn't seem like good business sense to me, but then again neither did refusing to sell old school PDFs.