Thoughts
Project/product idea: social printer. A printer, but you can add friends that are allowed to print from it to send you messages or images.
Obviously, this is equivalent in some way to a fax machine, but “fax” is a technology, and I have no attachment to the technology. You could build a social printer with an app and an internet connection.
Obviously, you’d also improve every other aspect of modern printers while you’re at it, but social features would give you inherit vitality.*