So You Want Continuous Time Zones [0] ? Or maybe you want to abolish them entirely [1] ?
If you get rid of time zones, people will replace them with an ad hoc system that does most of the same things but worse. The current implementation could be improved some, but time zones in general are close to the least worst option.
Putting time zones on top means people have to look up less.
Putting tomezones on top means people have to look up more.
But if it was notably more convenient, I would expect to see more people using it right now, even when it's not the default.
The next step is to just get rid of the country-sized timezones. Sure the sun doesn't rise in US West as US East at the same time but it also doesn't rise at the same time in Florida as it does in Maine.