Hm, kinda sad actually.  Say what you will, but the man is one of the best musicians to ever step on the stage.  Reuters:

Wearing a military-style black jacket decorated with silver sequins and punching the air, the 50-year-old revealed his plans on a makeshift stage at the 20,000-capacity O2 Arena where he will play 10 dates starting on July 8.
“Thank you all…this is it,” said Jackson from behind a pair of dark glasses.
“These will be my final shows … performances in London. When I say this is it, I mean this is it. I’ll be performing the songs my fans want to hear. This is it, this is really it, this is the final curtain call.”
Music promoter AEG Live, which has signed a deal with Jackson, said that the 10-show Las Vegas-style “residency” could be extended if there was sufficient demand for tickets.

Jackson looks pretty good for having turned himself into a mutant over the past couple of decades.  Even still, I expected him to stop at some point and yell, “Live from New York, it’s Saturday Night!”