In order to produce larger blocks in the future, we'll need miners to come up with more efficient communication schemes similar to the relay network. This just allows them to produce block space for cheaper and for us to enjoy lower-cost transactions. Win-win.
(Note also that what matters is the network average, and not a few fast connections [although those fast connections do help to lower the network average.])
Peter, you know exactly what that means: centralization. They WILL get bigger and better at it, the code will improve, the costs will slowly be negligible.
I'm not concerned with the miners interest but the nodes because they are the ones to whom the costs are externalized.
More block space, and cheaper transactions is NOT a win-win. It is in fact a classic tragedy of the commons: the miners and those who wish to fill the block chain with all matter of things in existence have an incentive that cost users access to the governance of the network.
I'm referring to a world of SPV wallets absent of privacy and ability to ensure yourself the decentralization of the network.