Sure - and I kind of agree with the previous poster who said "why not just carry around your MBP"? But - I have an i7 32GB Dell work-provided laptop that is extremely fast...and is 6 pounds... and I find myself carrying around my macbook whenever I have to go mobile, despite its limitations.. where I tried carrying around my ipad for 4 months and NEVER enjoyed it. So - if the point is super light stuff, absolutely - iPad. If the point is "light and mobile computing" - I vote macbook all day every day. I seriously can't get over how lightweight it is... and how uncompromising compared to a tablet. Again, totally my opinion, but I'd strongly suggest the o.p. try out a tablet for at least a week or two first.If it was only one machine I'd generally agree with you...but he already has a MacBook Pro.
Also - fwiw - I tried using a chromebook too - and found that limiting - so perhaps I'm just picky. The fact that I can carry around a crazy small and lightweight computer that does perfect window snapping, has all my programs natively and can run them all pretty well, has an excellent mousepad, has an ..acceptable keyboard (I don't love it, that's for sure - but I can deal) etc. - it's seriously a game-changer for me. I *love* my macbook.
Totally just my opinion. And o.p. may have completely different experience.