NoviiMedia makes software which you can put on your mobile device to turn it into a universal remote control for your TV, DVD player, Tivo, or sound system. I love it!
My Palm T|X is turning out to be a great investment. It's like having a universal remote, calendar, alarm clock, to-do list, music player, photo storage, deck of cards, phone book, address book, library, note pad, Web browser, and world atlas in my pocket. All except a phone.
Your laptop can do these things except it doesn't fit in your pocket.