I'm not sure your "It's been an Incredible Journey" post is the appropriate place to showcase marketing videos for a product you see "no clear path to deliver it to customers".
Not only the engineers are likely proud of their work and want to showcase it, they may also use this to promote themselves in their search for a new job.
The GEM is now literally legendary since no one will be able to use it long enough to discover the downsides. It can join Xanadu, Magic Cap, and BeOS in history.
Are they hoping for a last minute buyer?