So you want to use the Ellipsis to input "Send X BTC to 1XXXXXXX". Then the Ellipsis will tell the Quads (which hold the Bitcoin wallets) "Hey, send X BTC to 1XXXXXX" over SSH. Then the Quads will actually send the Bitcoin. This all is then somehow more secure because the wallet is not stored on the active machine, but separately.
It is possible to write this program using SSH and bitcoind.
Almost. If the wallet isn't on the active machine, it can't be lost or stolen. Also the secure keys could be stored separately, perhaps scanned as qr codes or loaded as needed via usb port. The tablet is essentially a dumb terminal. SSH would be configured to accept connections to the wallet only from devices with specific uuids.
I send a request for x amount of bitcoins, get back a qr code, the merchant scans the code, transaction is done.
At least I think that is what I'm reading about spending bitcoins.