I'm a high-powered New York executive that commutes by train to Manhattan and travels to Asia and Europe 5x a year and does domestic US travel 10x a year. And for those 75 days I'm away from home I don't want to carry a big, heavy notebook with me. On the road, in the business class lounge, at 30,000 feet, I don't need a lot of horsepower. I need to check email, run Powerpoint, read PDF's, run a few basic spreadsheets, Skype into meetings, the usual EVP stuff.
The 12" RMB is so thin and light and has such amazing battery life I can charge it up overnight, put it in my backpack, and literally forget its even there. And I can run presentations and take notes as I hop from appointment to appointment without having to bring the power adapter with me, the battery truly lasts all day.
My RMB sits in a drawer 200 days a year, but on those 165 days I need it it's a world-class solution for business travel. And combined with my iPad Air 2 I can board a plane with a whopping 20 hours of battery life, 100+ movies and TV shows, and those two devices combined weigh less than one of those Microsoft 2-in-1's and the MacBook Pro with no compromises to the tablet or the full-keyboard or media capacity.
So....you ask me....the target audience for the 12" MacBook is someone who travels a lot, or commutes by train every day, or is a student on a vast campus. It's not for the power user, not for a graphic artist or an HD movie compiler. It's a very portable notebook for a very portable audience.
BJ