Maybe this will end their reign of terror. Although I'm not sure that the airlines will actually enforce it, since there were similar policies already in place, which I always hoped would be used, but never were, at least not when they could have rescued me from on-board hippo-wrestling.
Next, they should let passengers of below-average weight bring more luggage. Seriously. It's only fair.
And don't even get me started on babies and young children. Do you remember when there used to be smoking on planes, and there was a smoking section and a non-smoking section? Yeah, they need to do that with babies and kids now. Put them in their own soundproof cabin, and everyone will be happier, except the parents, perhaps.