Comment Copper limited bandwidth (Score 1) 359
When I was working on large farms of big iron (SGI, Sun, IBM systems) we regularly found that GigE over copper couldn't do much better than 400-500 Mbit/s. These were enterprise-class NICs, not cheap-o home gear. Switching to fiber got us much much closer to theoretical max.
When is fiber going to finally be available/affordable for the home market? I think that will make the biggest difference...