I'd say of the three losing the laptop would be the worst. I would be unable to do any of my work at all, and the comm functions of the phone could technically be made up by the laptop and a dumb phone.
Laptop: essential like indoor plumbing
Phone: very useful, major time-saver, but could live without
Tablet: nice for reading but dispensable
Tablets are the only endangered class that I see. They occupy an uncanny valley: too small and restrictive for what you do on laptops, too big to be as portable as a smart phone.