Wireless seems like the logical step, but in fact, it has some serious limitations to overcome before it can get even close to "wires" well, fibre actually, during my last 25 years working in IT I have been involved in different ways with networks, we had/have, copper (going back to phone net) wireless, micro wave, Ethernet, you name it, and personally, I don't see a full wireless solution for a very long time, total fibre is probably the best option, but, it's going to cost big money and time, the current fibre to the node was/is a feel good solution that is nothing more than a patch work job at best.