Not at this point... I am currently in college and can't really do without my laptop.
However, upon graduation I intend on purchasing an iMac and consequently use my iPad as my primary mobile device. At that point I shouldn't need a fully featured mobile computer.
I'll probably keep my 2007 MacBook Pro forever, though. After all, it was my first Mac!
That's what I said about my 128k Mac back in 1984...."I'll keep this forever"....wish I did but that's another story....