A realistic yet inexpensive robot hand that can curl its fingers in response to a remote wearer (wearing a glove). Would enable physical handshakes over the internet. And probably other things as well, people being as creative as they are...
That would be perfect for when somebody contacts you by email about millions of dollars to share. Once there's a real physical handshake, they would have no way to back out of that deal! Too much honor at stake!
