Re: Crystal ball time
I am not convinced we'll be seeing the back of Tetra, Tetrapol and the likes for a long time.
Yes, they are expensive. Yes, they are old kit which struggle to cope with anything other than voice and SMS. BUT, as someone mentioned already, it's their "private" network, which should work regardless of regular UMTS-GSM congestion or jamming.
I know current (HSDPA, UMTS and the like) radio standards allow for number/terminal priorisation, but if something like the Nodnol bombings ever happened again, the security services are not utterly happy of having to share the band.
Hence, for the 3gCops, expect to see them with two terminals or with some, even more expensive, dual Tetra-LTE (or whatever) terminals.