When you have the means to harvest and beam out a GW in space, it is not like the only use for it would be sending those probes. Seems like damn useful infrastructure for almost anything else. So, we can expect the hurdles to be overcome for other purposes as well...

Betting against humans making breakthroughs is usually a bad bet. As the saying goes: "You can say 'it can't be done' all you want, but please stay out of the way of those who are doing it."!