I don't consider the ipad and a Macbook Pro in the same category. Nothing about the ipad reminds me of the MacbookPro.
When I bought my Macbook Pro I also bought a Dell XPS 1210. Both with the same processor, both with the same memory. The Dell was for travel and I needed something to do emergency editing too. The Macbook Pro was purchased for different reason. I needed a Mac platform to run Final Cut Pro that I could use to loan out to FCP editors I would hire for contract projects. I would have purchased another Dell for the same purpose but as stated earlier there are lots more FCP contract editors out there than Vegas editors. I never intended to use the Mac for my personal use since the hardware was so Appleesque and difficult to do things my way. In addition, I realized that the Dell and the Macbook Pro were technically similar but feature for feature, the Dell had twice the guts as the Apple. Twice the number of I/O, had Verizon EVDO built in, had a camera that swiveled rather than fixed more connections and multipleSD card access, screen was brighter in the sun. etc. The Mac had better speakers, was heavier, and clumsy. Too big to open up on an airplane tray.
With different people using it I soon had trouble with the hard drive on the Mac. It kept crashing and losing my work. On the Dell swapping out hard drives was a snap, 4 screws and the drive pulled out in a drawer style. I could swap drives in a few seconds. The Macbook Pro put me through an hour of removing a hundred tiny watch like screws, layer upon layer of stuff just to get the the drive which was glued in place. Finally installed the replacement and the reinstall of the OS went smoothly. I replaced my Windows HD on the XPS with a larger drive and then had several drives in swappable trays for Vista, XP, and Win 7. Easy to swap. The Mac ran Parallels so I could run many of my windows programs but the Dell could run several copies of Vegas to edit and render one project while I ran a second instance for editing at the same time. Mac couldn't do that without bringing it to its knees.
Today, I only get the Macbook Pro out if I really want to do something that requires a Mac OSx. That is very rare. However, I use the Dell several hours a day, it's just easier. Certainly much easier to use than my Macbook Pro.
Finally, if you're used to being in control of a windows OS, like knowing the logical order of where all your files are for a project, you'll discover the Mac is loaded with lots of surprises and will seem quite awkward. It will require a learning curve to get used to. If you like doing things in a custom way, the Windows OS is much better. Dual OS works on the Macbook but windows runs applications slower with same processor. If you would rather let the OS dictate to you how to do your projects and don't want to be in control, then the Macbook is probably your toy.
Another thing I realized with Mac video editors- their game is doing a video project on a Mac and FCP. With the PC and Vegas editing, the name of the game is completing the project on time and making a profit. FCP editors like to brag how many use FCP and how popular it is. With PC and Vegas editors the brag is how many projects they completed.
