I guess I'm a bit late since the OP has removed his post, but I'll throw something in anyway.
I switched from Olympus to Canon last year and man was I torn between choices back then.
I didn't care so much about going with a mainstream brand, but still Canon and Nikon were the two choices. I actually wanted a good supply of used equipment since with Oly, you had to buy everything new.
I looked at both brands long and hard back then. And even though I went with Canon, I do think that Nikon makes better cameras (even with that said, I'm not switching camps any time soon though).
The gripe I had with Nikon was that damn, they don't get anything done. Canons line seemed brand spanking new at that point when compared to Nikon (at least on paper).
I actually wanted an APS-C - camera since I do mostly nature photography and the extra reach is always welcome there.
So Nikon has the D300s (no D7000 at that time), which is based on technology from the original D300 (2007) and was released in 2009. And it still hasn't been replaced. That's 4 years which needless to say is a damn long time.
My Olympus E-3 was also from 2007, so no chance I'd trade in my camera for a model which is as old as the old one.
The D700 is from 2008 and would not make me want to switch to that either. Same goes actually with the 5D MkII, so even-steven there.
If they had released the D7000 back then, I might be with Nikon now, but somehow I think I would still have wanted the D400 or what ever it may be once it's released.
It's actually funny, I stated that Nikon makes better cameras and the people who use them probably know this for a fact (otherwise nobody would buy their cameras since they are so old), but when you come from an outside brand, they just don't have an appeal.
In the end I went with the Canon 7D, quite happy (except with the low ISO noise) but that was the only APS-C - camera at that time which interested me and that hasn't changed.
After all this time, I think and at least hope that there's improvements to be put in new cameras, now all we need to do is stop the manufacturers playing the "I'll show you if you'll show me yours first" - game and get something out.
I don't think it's going to be a revolution, not anymore, but evolution is also good. On the other hand, I don't want constant updates for every little evolutionary step that comes along.
Even though the prosumer to pro market isn't that big, it's still relevant since it keeps the line-up appealing and when you get someone to buy a dslr, they are buying into a system which is important for the company.
A bit of rambling there, but that's just me