...the vast majority of control towers are still largely reliant on technology dating back to WWII. Two-way radios, paper flight progress strips, and decades-old radar systems are still incredibly common. In many cases, the fundamental function of the air traffic control system is well overdue for an overhaul.
Several options are being explored, from centralized management to completely automatic control. While studies are underway into the best way to manage air traffic in the future, most of the concepts being considered are still some years away.
London City turned its air traffic management over to a group of smart cameras last April. It is the first in the UK to do so, although the technology has been well explored in other parts of Europe.