Space solar skepticism

Some skepticism about space-based solar power here. I find the email from Martin Hoffert particularly interesting. He's concerned that promises of near-term viability, as with the PG&E project, will damage the genuinely promising long-term prospect of beaming solar power to Earth. That strikes me as plausible. 2016 is not very far away, though a lot could happen over a longer time -- albeit not necessarily "50 years from now (or maybe never), long after the climate is destroyed," as Joe Romm puts it. Meanwhile, building more nuclear plants would be wise.