If the rumours that the 7DmkII include something 'ground-breaking' - I am hoping it is it's IQ - which would mean a new sensor, and hopefully with an improved sensor manufacturing process - that would lead to less noise, greater DR, few banding issues, etc. However the 7D's sensor is not as bad as some people make it out to be.
I love my 7D. Sure, there are other aspects about the 7D that could be improved upon (eg ability to focus with less light, and somewhat improved AF consistency - especially with Live View) - but as a whole package it's an awesome DSLR, and that's why I bought it soon after it was released.
Of course technique and glass also are very important. But as far as buying a DSLR body I haven't looked back from purchasing the 7D. The thousands of quality photos I've captured with it are worth it to me. Even today there are still many landscape, macro, wildlife, portrait, event photos that I take which discerning people are very happy with.
Roll on technology improvements and competition!