Power copper wire is very thick and it allows lots of high frequencies to coexist with one another, it also has tones of bandwidth, tones. Just the technology is the limiting factor, but that will improve with time and take up of the product. Perhaps the next monopoly of copper wire communications will be the power companies and not TLS, however, unwired broadband technologies are eating into the big Telco's profits too.
The point is thick copper wire is the fastest versus other cable and unwired technologies. This newly released technology will cause debate since many Teco’s and new communication technology companies fight for their market share/investment, noting communication technologies use-by-dates are generally stamped for a few years use.
In areas Telco's do not have fiberoptic cables hung and or not viable for the Telco to set-up a fiberoptic infrastructure (the later to be true) and the power copper wire is already there lies the thin edge for a new broadband over power line service entry point for Australia i.e. in the remote country areas without Telco fiberoptic infrastructure except for he odd farming community that has set-up their own WIFI network in the hill tops.
I see the technology being implemented on outback wire fences too, that run for tens (100's?) of miles. It's the frequency the transducers detected rather than the amperage/wattage of the signal's/frequency strength.
Leakage, noise from the current version of the technology seems to be the concern. The trials will tell or quell this concern (rember BPL uses low amps).
