In the beginning, Minecraft was a totally mind blowing concept, and it truly did change the way the world thinks about gaming. It's een being used for commercial/industrial purposes now - especially in design and engineering firms, where it's a fast way to make a rough design which looks good and can include some features.
However, it is being treated as just another game by most of it's players. There was, for a time, potential for Minecraft to become the next evolution in computing and gaming, however it missed its chance because everyone focussed on its use as a game instead of the groundbreaking design behind it. Having said that, it was designed as a game and Notch never intended it to be anything else.
The great thing about Towns is that, at least for the moment, nobody's treating it as "just a game". Sure, we all love playing it, but moreover we love the sheer possibilities it holds. This game could very well add new flavour to gaming as a whole with the unique concepts it adds, such as the Devs actually assisting modders and adding RPG elements to the RTS/citybuilding genre. Again, Towns is designed as a game, however if the concepts behind it can be applied to other games then we could see a major shake up in how games are made.
As Eric Doe said, Towns is "amazing work", not "an amazing game". There is still potential for Towns to be more than just a great game, and the major driving force behind what happens to it will come from the community. So rather than focussing on what we can do in the game, I for one am more excited about what we can do with the game.
What's that you're eating? A nice, juicy apple? You weren't supposed to eat that you fool, you were supposed to make it into a pie! - last words recorded words of Francis D'Avre before he went looking for snowcherries, but found a hungry Yeti instead.