Since when is presenting facts naysaying? Just because you don't understand the facts doesn't mean they disappear.

The synthetic wood manufacturing requires high amounts of heat, impractical to deliver through electricity. The transmission lines would have to be enormous, not to mention actually generating enough of it. The more efficient and practical way to use renewables would be to use concentrated solar thermal, but that's still under development for industrial use. Fusion sounds great in theory too. Question is will it be economically viable.

I am curious where you read that it's to replace concrete. The treated wood still contains cellulose which is vulnerable to water. Most concrete applications are exposed to water.