Oh you're ianshop? You're in, of course.

However this week I learned about very similar idea as mine,
using even some of the components I was thinking of employing (A-Frame),
only that it is built on Ethereum.

https://decentraland.org/

I need to study this more before decxiding what to do.

The thing about MIL is that it is pretty old by now. The escrow
functionality that it implemented can be done more safely and efficiently
with scripting in the more modern versions of Bitcoin. The reason
that it has not (to my knowledge) been done is because of the
vulnerability in the off-chain negotiation process - something that
also always worried me with MIL