so this came out today, and being kind of a fanboy of the series, I had it preloaded and ready, and then spent like 6 hours playing it. and because I'm having a lot of fun with it so far and I think you might too, I thought I'd make a thread about it.
First off, it's very atmospheric, in a way that I'd call Japanese War Epic Made by a Westerner (though the pre-battle speeches are actually in subtitled Japanese, which I thought was especially cool, even if they say "Japan" and not "Nippon").
here's the intro:
http://www.youtube.com/watch?v=_EQWcB1vXXg. the entire game is more or less like that in tone.
as far as actual gameplay goes, PC Gamer gave it a glowing review and a score of 92. edit: originally, I had link to their review here, but then I found another one, by Tim stone, who is basically an authority on rts games, and it's better, so here.
http://www.eurogamer.net/articles/2011-03-11-total-war-shogun-2-reviewoh, also there's a 6 gig demo for this on Steam, if you want to try before you buy. it's pretty long, and gives you a good idea of what to expect, though it doesn't let you play any naval battles.