Well, obviously that wouldn't work out well with current cars, but for future ones that don't need a driver, then they are obviously going to make ones that have a proper bed as lots of people will be doing this.
Something like this is going to have to happen in the UK. As automation takes over more and more jobs, there simply won't be enough employment for everyone to have a job if they want to or not. It's not going to be long before all taxi drivers, lorry drivers etc are replaced by automated cars...