And there goes another one. Matt Smith is the Doctor that really seemed to appeal to the American audiences, since it was under his term the show really started building popularity in the US. It'll be interesting to see how the next Doctor goes over with Americans.
Also, I'm sure the Eleventh will continue to be active in novels or even audio dramas, if/when Big Finish gets the license to do the new series. After all, the Eleventh is one of the few to have a gap period during his run, and with him its a couple hundred years.