In the spirit of "best thing we can do with carbon is bury it", this could be great for the environment. Assumptions: less energy used for production than melting glass, easier process and shorter transport distances, recycling glass takes more energy than burying / decomposing the wood, we get even more commercial reasons for planting trees.
The problems could be in how long that "wood-glass" lasts. Will you see cracks soon? Will any insects start drilling your windows?
This is wood soaked in epoxy. The epoxy should provide plenty of protection (note that lots of houses are made of regular wood, so I don't think this is much of a problem anyway).
> note that lots of houses are made of regular wood
Yes, but that's why in certain areas you need to do termite inspections because the treated wood doesn't provide 100% protection. Also the wooden parts are normally protected by other materials to not be exposed to rain and rot - in this one the epoxy layer would likely do that, but still, it depends on good coverage/protection.
The problems could be in how long that "wood-glass" lasts. Will you see cracks soon? Will any insects start drilling your windows?