I had to jump in here. Whenever I get new cameraitis I get my 7D out and go take some pictures. Tonight I used my tripod and took several shots off of my patio as the sun was going down. I used my 24-105 at 28 mm and F8. I tried a few little tweaks like bumping the saturation up to 1 in the Neutral setting and increasing the sharpness to 2. I tried different focus modes from my usual "Single point AF", including the manual zone select shifted to the left for a particular tree. I played with white balance settings. I shot in Live mode with a 2 second timer for many of the shots. I took 19 shots all in all. Brought them inside and pixel peeped the heck out of them. I made some crops, kept one in the original framing, and made a watercolor out of a crop of the tree that caught my eye. The crummy old 7D will still take better images than I can visualize. I don't use the fast focus on mine so much, stills and macro are more my thing. My point is, the camera isn't the limitation, I am.
Still, the new ones will make it easier to get good images (we used to say exposures) and I like the idea of higher res. With high resolution you can use a really good fixed lens and crop your zoom later. I feel like I am missing out on something not having a new way cool camera right now! I guess I'll just try to get more things framed correctly the first time and learn how to use the camera I have with more skill!!! LOL