Re: Based in real technology already available as of today
Space-based solar power ideas have been around for ages, and don't involve a tightly focussed laser incinerating insects, birds, planes and anything else that happens to enter the beam.
Usually because the beam is radio frequency and distributed over a large areas such that incident power levels are around 250W per sq. metre. Use really big rectennas to harvest the RF energy and convert it back to electricity.
Problem solved, right? The physics is well known says it's theoretically perfectly viable.
Your existing "real technology" is the problem. You neeed vast solar collectors in space, areas measured in square kilometers, rather than square metres. We know how to make solar panels for use in space. We don't know how to construct collosal space structures, complete with station keeping and everything else you need to collect enough energy and keep the beam on target.
So that's a big problem, but even that can be overcome with sufficient will, time, effort and lot's and lot's of money. The biggest things missing right now are the will and enough funding to make it happen. Not enugh ROI for private investors, so it has to be governments. And they only care about the next election. SBSP is way to far out to be on their radar beyond "yeah, we've heard of it".
I think Caltech has just launched a cubesat demonstrator to test the principles. But that's an 8 inch cube, not a Disneyland carpark. Proving a concept won't solve the need for a truly vast collection area in space.