I have an observation that may not be particularly popular in this audience, but I'm going to make it anyway.
As I see it, a LOT of the most groundbreaking music is being made in the electronic and hip-hop genres. Production-wise, this is where the boundaries are being pushed - and this has been the case for many years. I'm not talking about your cheesy house or top-40 RnB either, but rather in the more "niche" areas, such as minimalist techno and some of the more unusual flavours of hip-hop.
Why is this? I suspect it's due to the very nature of electronic production - I'm talking mainly about electronic stuff here, but the same applies to hip-hop (and, to a degree, anything which is produced on a computer, including a lot of indie stuff). Ten years ago, making music from a computer was an arcane art, and as such there was a certain level of skill and creativity required to even get anything out. Following the subsequent massive uptake of home mixing studios and user-friendly "trance in your bedroom" programs like FL Studio, there has been a certain evolutionary response in the genre - you need to be brilliant to rise about the dross.
A good example is the late J. Dilla. The man was a genius hip-hop producer, who had a massive effect on the genre despite being almost unknown by name. If you're interested, get hold of his solo release Donuts - it's a good place to begin. Some of the tricks this guy has come up with are almost standard now, but were ground-breaking at the time. It might even be the case that they will hang around influencing popular music (I use the term in the loosest possible sense) for years, much like the riffs and progressions of Led Zeppelin, or the vocal approach of The Pixies.
Certainly, there will always be room for the two-guitars-vocals-and-a-drum-kit approach, and I think there are some groups roaming the frontiers here as well - you guys are more qualified to judge exactly who, since although I know what I like, I'm certainly not all that au-fair with the indie scene. But there is a LOT of stagnation, and originality is getting harder and harder to come by.
I could keep going for hours, but I have to go to a trivia night. What do you think? Think I've made a valid point? Think I'm totally wrong?