Number one reason....portability. I was carrying a 13" MacBook everywhere I went. I had to have a tote rather than a purse, and it was heavy.
Another benefit of a iPad/iMac combo instead of a MacBook/iMac combo is only one iTunes library. My iTunes library is huge and keeping it organized can be difficult. With a MacBook, I have to make sure I transfer what's in its library over to my main library on the iMac.
Another benefit of a iPad/iMac combo instead of a MacBook/iMac combo is only one iTunes library. My iTunes library is huge and keeping it organized can be difficult. With a MacBook, I have to make sure I transfer what's in its library over to my main library on the iMac.