Hi Bill,
I originally put a PC into my shop to have quick access to an automotive database program while working on vehicles.
However, I find I use it for a whole lot more!
-looking up tools, fluids, recommended techniques, etc.
-reading PDF copies of manuals for the tools I have
-playing music (either mp3's, streaming audio) and podcasts (the CBC radio science show "Quirks and Quarks" is one of my favourites.)
-checking my bids for tools on ebay
-and of course reading/posting at the Hobby Machinist....
It is one essential shop tool for me now, even though mine is an old athalon processor running Windows XP.
I did build a 1/4 inch plywood box for it with fans and filters to help extend its life.
When it eventually dies, I kept another old retired PC to replace it.
-brino