Well, as promised, I picked up Anno 1701 today.
It's a surprisingly deep and complex colony game. Some RTS Age of Empires III elements to it, without the madness of rushes at this juncture (the thing about the RTS genre I don't like). Feels like a fusion of a RTS/Turn based game so far. I have never played the PC version, but Anno 1701's roots are clearly showing. Target age level on this game is definitely skewing high teens/adult.
Interface wise, it's a stylus/radial driven game with a really satisfying ability to move about the map with the stylus - including a swishy thing where you can move with the stylus so that the screen is moving a little even after the stylus has stopped contacting the touchscreen. Sort of screen moving-through-momentum kind of thing. I really like this aspect of the stylus interface (I'm all about stylus GUIs and DS games right now in terms of game design).
So far - I'm enjoying it a lot. More than I enjoyed Panzer Tactics DS, tbh.
I would never presume to "review" something on a few hours play, but my first impressions are very favorable. I'd say the game is most relevant to RPGWarch readers because this is one of the new DS titles aimed at an older age group. It says "E" on the box; don't you believe it. It's a game for grown-ups.
Happily, there are more of those on the way for the NDS platform.