It's not long before a huge chunk of food service jobs will be automated away by robotics, and that will likely include sandwich making.
That's all I want a homebot for. "Homebot, make me some Gordon Ramsey level Beef Wellington". Beep boop beep, "Ready in 40 minutes".
To be honest I think automated sandwich/burger making has been possible for a long time already. But fast food level labour is just so cheap that it never caught on.