Surely I'm not the only one who's pondered this.
Everyone who's ever used road shoes knows that they're a pain in the ass to walk around in. Big corporations like Shimano must have noticed this by now. How come they haven't developed a shoe with can retract the cleat back into the body? Of course, there will always be a compromise whether it be in stiffness or weight, etcetera. However, I'd be willing to sacrifice that for ankles that work. When I first started road cycling I used road shoes, so I've switched over to using MTB shoes since the cleat doesn't lift my foot up.
What about tennis/running shoes with retractable cleats? I'd definitely invest in a pair of those. I'm not willing to put platform/clipless combination peddles on my bike just yet, so a shoe that I could walk around in then jump onto my bike in would be fantastic. I guess there'd be very little stiffness in such a shoe, but again, I wouldn't be racing in that shoe so it's okay.
(NOTE: I think the second one's been brought up before, I just thought I'd bring it up one more time.)