I'm for this. Get rid of timezones, AM, PM, DST, leap years, seconds, all of it! Imagine having to know just one time. It takes a bit to wrap your head around. But only because we've accepted all the confusion for so long. The sun is still going to be "up" in one part of the world and "down" in another. The little numbers on your clock don't change that. Why can't it be the same little numbers everywhere?
I'm for that as well. Some minor issues that I've thought of. Currently the day changes (Mon -> Tue) at midnight local time. If the day followed UTC, then would California change from Mon->Tues at midnight UTC, which is 4pm currently?