Is it worth getting the 6s or waiting for the 7?

I’ve been thinking about this ever since the 6s came out and 3D touch was announced. It is of course the 3D touch feature that I’m most interested in. Aside from that it is just another iPhone. But I’m torn. Should I wait for the 7, which will invariably have more features and I might want one of those, or should I dive in now and get a 6s and use the 3D touch?

I’m not sure. The cautious part of me says to wait, but I’m not sure it’s right this time.