I wonder if I'm going to get satisfaction out of this, but, Vicky - you seem to be implying that you should be able to access a Tv computer even when it's turned off.
Then you'd be 'in a clear mind'. Huh?
The meaning of 'access unattended 24/7' means that a remote, host, computer sitting idly can be communicated with at essentially any time, surely? Tv says nothing about power consumption, heat generation, carbon dioxide production, atmospheric temperature rises, melting icecaps nor ('oooo, oooo') global warming
That's just not Tv's concern.
Or are you saying that a viable alternative to your entire computer setup is an operating system on a bootable USB stick? My primary 'remote' computer setup would be four PCs, each with their own special purposes, connected by a LAN, with various CPU capabilities, and with a few terabytes of storage. Can you imagine a USB stick simulating that?
And - it's up to date. Imaging my four computers onto a USB stick, however you would do it, would take... how many days?
I think the principle has to be that if you can't take it with you, virtualise its presence. Are we on the same page?