Not even close. Everyone and their brother has a "vision" for what it will look like, but back in the real world there is nothing solid.

5G is shorthand for "the next gen of mobile tech."

The more operative keyword here is millimeter wave, since 5g doesn't imply any specifics.

5G is just a rename of 4G, just like 4G/LTE is a rename of 3.9G/LTE