Little Details...
Let me start off by saying that I have a TON of respect for Google as a company. They've done a HUGE number of innovative things and their competition is forcing Microsoft to deliver more value to customers.
I think MSFT views GOOG as a competitor and I would suspect the reverse is true, so even if you are running Windows XP, I would think you'd want to change the screensaver for the PC at your booth.
It's the little details that matter.