I wasn't aware that plane windows create this much drag. If the reported 60% fuel reduction (on small jets) yields similar results on commercial planes, I wonder how much more viable electric planes will become.

As usual with new tech these days, there's a caveat near the end of the article: "[...] it’s “possible” they could even display airline safety videos, in-flight entertainment (like movies and shows), or advertisements".

Ads aren't something that private jet owners will be concerned about, but if you've ever been on a Ryanair flight, you know they will pull every stop to make the experience as terrible as possible to extract a couple more cents out of you.