Rumor of the Day: Scaled Dungeons & Experience?

WoW Insider is sporting a fascinating new video that reportedly shows level ninety player entering a level 40-something dungeon with his item levels and health suddenly dropping to the same level as the dungeon. Are the days of soloing low-level dungeons over? Perhaps this is something we'll hear more about at Blizzcon. Would you support such a move, to find great (and underused) old content challenging again?