Cory's sensationalistic headline notwithstanding, this is a great idea. Aside from the disabled and people with their hands full, I wish for lever handles in my rental apartment every time I try to go outside just after lotioning my hands.
The only problem I've ever had with lever handles was a dog who figured out that she could jump up and pull them down to open the front door. Reinstalling the levers upside-down fixed that easily, though. Besides which, "People can also still buy doorknobs and put them back on lever handle-equipped houses," according to the article.