Just slightly off topic – what will happen to black and white licences for those that prefer to watch on older sets?

As I understand it, digi-boxes are receivers (which is what the licence is paid for) and to the best of my knowledge, there are no b&w only digi-boxes.

On a similar vein, what if someone keeps their old non-digi telly and just watches DVDs, will the licence dodger crews have to accept this in the future?