There is a comment on the article that is spot on - why the hell would you make an electric JET? Especially for lower altitude / shorter hops? It honestly makes no sense.

In a prop or turboprop application, the energy is sued to turn a prop, and waste energy (exhaust gases) don't really play a role in energy generation.

In a jet, you accelerate the air in the core. Is it even REMOTELY efficient to accelerate air this way using electric power?

Boeing didn't put that much money into them, if their tech was as amazing as they describe, why not go ahead and get other funders?

Finally, the go on about their patents. I took a quick look. Pretty trash - generalized system design patents.

"System and methods for implementing regional air transit network using hybrid-electric aircraft"

"Systems, apparatuses, and methods for overcoming the disadvantages of current air transportation systems that might be used for regional travel by providing a more cost effective and convenient regional air transport system."

This is hardly the type of stuff that gives you a big breakthrough.