Both problems are worth effort and energy. It is worthwhile to push the envelope at the top because that technology, if it really works and can be developed in a more consumer friendly way, will eventually become vastly more accessible.
Solving gigantic scale problems requires a completely different kind of innovation than what you can achieve by pushing the pinnacle of what's possible.
It also in its (albeit) small way could push ISPs to get their act together. Perhaps thats a bit naive to say but if this sort technology is available, this will help push the boat forward in terms of underlying infrastructure.
Solving gigantic scale problems requires a completely different kind of innovation than what you can achieve by pushing the pinnacle of what's possible.