Smart: utility software linked to a hardware device. The Migo is a \\(150 128MB USB chipdisk. That's about a \\)100 premium over what at first glance appears to be a similar device. But the Migo has a custom driver that grabs your Outlook settings, your Favorites folder, etc. Now, let's just say that you wrote a utility program that allows you to zip up your /Local Settings folder and carry it around with you. Think you could sell it for \\(100 and say "Just use it with your \\)50 chipdisk"? Of course not. You might get a handful of registrations if you made it \$30 shareware. But probably not.
That's why it's a good idea to learn about .NET Compact Framework and SPOT.