The ILS protection problem will go away if airlines move to GPS approaches which are on their way. Remote towers might mean a few less controllers but most will still be there as they are still doing the job. Remote towers are just a new place to work not an automated system.
They probably work best as economies of scale though and it's a very fair point that it might be hard for airports to change provider if they wanted to in that situation. Also with nats losing contracts of late the market is getting fragmented.