When the PC tech-support guys at work (with company-issued Sprint Moguls) come by your desk for tech support, upgrades and rom-flashing tips on their Titans.
When you're on a road trip, using your Titan to navigate, while listening to streaming 'net radio through your BT headset, and then you answer an incoming call and TomTom continues to "tell you where to go".
When your co-worker with a Touch offers you good money to buy your Mogul, and you refuse, and tell him that *you* have GPS and Rev. A and you're not going to downgrade to a lowly Touch.