Well, to provide a counter example to some of y'all, I consider myself a political historian of the U.S. South, perhaps the most staid and well worn topic within American history. Also, I myself am Southern. Trying to sell oneself as a political historian period, takes some gall these days. Not being terribly interested in either quantitative analysis or electoral politics- but unwilling to call myself a social or cultural historian- I stick with politics because I am mostly interested in questions of power, and how power is maintained within systems of varying levels of identity and material codependency.
I've had many professors remind me that political history has been out of fashion since the social turn of the sixties and the cultural/linguistic turns, ect. Granted, that is an over-simplistic telling of how the academy has developed, and many of the foundational works of Southern political history have been written in the past 20-25 years.
As to my thoughts on the future of history.. I suppose if we are talking about the academy- and largely we are talking about the western academy- then my speculation is that professional history will-
a) become increasingly more inclusive of what is considered source material, and what is "the archive."
return, I hope, to a more activist role in shaping political discussion.
c) I think that the rise of transnational history points to a future for history in a possible "post-national" political structure. Granted, that has been posited before, and here we are in the 21st century, still living in nation-states.
d) while some point to quantitative methodologies gaining more and more prominence, I think that it's important to note that history has turned, and returned to quantitative or otherwise "scientific" historical methodology, most notably at the turn of the century, and then again in the 60s and 70s. If it happens again, it'll be same song, different verse.
I hope we remain mindful (and I try to remind myself daily, through this process) that while professional history projects a sense of itself as everlasting; the inheritors of a tradition from Herodotus through Van Ranke on to today, in many ways- like any institution- has a myth of origin, is largely preoccupied with self perpetuation, and exists on a foundation that is both largely out of its own control can certainly be shaken.
While humans will never stop interpreting the past, our fashion of doing so through the medium of academic history is fairly distinct, rarefied, and new. We'll see what happens.
Then, later, we and our progeny will write about it.