With all the hype around early 5G launches and tests, there's one glaring problem: the telecom industry hasn't really defined what 5G is. However, the super-fast wireless is starting to take shape. The International Telecommunication Union has published draft 5G specs that set performance expectations. As a user, you should get 100Mbps download speeds and 50Mbps for uploads -- unlike with LTE, though, that's more of a consistent baseline than a theoretical maximum. You should also see extremely low lag of no more than 4ms (versus 20ms for LTE), and service should work on trains traveling as quickly as 500km/h (311MPH). In short, this should be as fast as a good home internet connection.