I've had a cheap netbook in my studio for over a year. It's not pretty since I don't always wash my hands before touching it, but it works. I have it hooked up to an old surround speaker system we were no longer using, so at least it sounds great.
I wouldn't risk it with an iPad... too expensive (you can buy a brand new netbook for under $200), and made of glass. Seems like a disaster waiting to happen.