This proposal isn't that you wake up at 7:00am Greenwich time regardless of where you are on the planet, though. The proposal is that you wake up at sunrise (or whatever), which might be at 19:00 Greenwich time, and everybody just has an absolute measure of time that's the same everywhere, abolishing timezones (potentially making it easier to schedule a meeting across timezones).

I'm not necessarily in favour of this plan, I think I'd be fine with it, but I think timezones are a somewhat useful abstraction. The one thing that always bothers me related to this, though, is the argument about whether or not we should have permanent DST or no DST based on whether we should wake up "earlier" or "later" in the sun cycle or whatever... And like... It doesn't matter. You can call it 6:00am or 7:00am, you're waking up at the same time. It doesn't matter if we call the hours that business are open from 9:00-17:00 or 8:00-16:00... When the clocks don't change the times are just arbitrary names. Ultimately I really don't care, I just want people to stop fucking with clocks every 6 months... But because the numbers are somewhat arbitrary I think we should settle on no DST because then noon more accurately corresponds to solar noon, which I think makes more sense and would help people be more in tune with the solar cycle.