They are semi-real, but a scam so far, preying on dreams and creating false hopes. As Jesus said more than once, your faith has made you whole. Here's an article about how it all started, although it does not specifically mention "Med Beds."
https://archive.is/nmdI7
Are devices like hypothesized "medbeds" real and will they become available to the general public?
Theyre not real
They are semi-real, but a scam so far, preying on dreams and creating false hopes. As Jesus said more than once, your faith has made you whole. Here's an article about how it all started, although it does not specifically mention "Med Beds." https://archive.is/nmdI7
Theoretically it is possible, but not plausible.