Lots of negative views here but they are coming; try not to be a Luddite.
Look at Dublin, which can now control Cork and Shannon.
Also Sweden which has fully embraced it for the remote northern airports; cost savings in recruitment, training, familiarisation, retention, and buildings is very significant. They help to ensure airports with few scheduled flights/day stay operational. Hard to justify the costs to import human ATCOs to live in the remotest of places to clear perhaps 10 flights per shift.
Australia uses Remote Towers for places like Alice Springs airport, which is controlled from Adelaide some 1,500km away. And how many capable, well paid controllers want to live in the Outback: if you think it's easy, you've never tried recruiting the numbers needed to fill a roster for such places.
These airports will prove the veracity of the technology, like the ETOPS Twins eventually tolled the death knell for the B747/A340's on the trans-oceanic routes.