Let's see... Cable/Sat TV feed, Music feed, low volt lighting source, second electrical source, intercom line, phone line hardware (and more than just one pair!!), secondary gas line for the heater and/or LPG welding set up/Forge/foundry ... Of course the Cat5/Cat7 line... Who knows what the future may bring as well.
That's just for starters. I like Kevin's idea of a pneumatic capsule launcher - always wanted one of those, maybe that bank or pharmacy with the drive-thru windows will be going out of business soon...
Know what I'd run also, thinking about it? Water and sewer lines. Think of a shower / commode in your shop, not to mention a large sink, water sources, and even a fire supression system... paradise!