I think that was the expectation a few generations ago, once TVs were in most people's homes, but it didn't happen. I recall seeing a headline for a study a couple of years ago that said that regional accents were actually getting stronger.
Now if only the Google maps (mobile version) devs would read this. On Android anyway, no matter how much you zoom the text labels on things like street and highway numbers will not enlarge.
5 years ago that wasn't the case.
"it's" = "it is"