A Canon patent spotted by Digicame-Info shows what Canon’s engineers have in mind for the company’s future lenses. An LCD display on the lens that will show all kind of information.
From the images above it seems the lens LCD display will show information about distance/depth of field, and also about stabilisation issues on both axis’.
Cool patent. Currently, a replacement for the EF 70-300mm f/4-5.6 IS is rumored to have such a display.