iPad Pro is a huge opportunity, one that will change the way that many people use "computers." Thousands of people already LOVE the idea of this product and will buy it simply to replace an aging computer, or their current tablet because the enlarged screen size alone is a hit. Tens of thousands more will buy it once they become more aware, get their hands on it for the first time, or see someone else with it.
The fact that it does not get MS Office's (and other various professional applications) full potential is not even consideration to a large portion of these people (myself included). Not all of the people that the iPad Pro appeals to are "pro users," some of us just don't need "desktop class applications," but do want full-size Email, Web Browsing, Shopping, Social Apps, Photo Browsing/Tweaking, Multimedia Consumption, Budgeting, Notes, Calendars, Recipe Management, Messages, Letter Writing and Printing via WiFi, Maps, Games, etc. (I probably do 3 times more with "mobile apps" than 99% of the people I interact with do with their mobile apps and desktop apps combined.)
Technically, the iPad Pro (even with 128 GB of storage) costs less than all of Apple's 12 inch+ portable Macs. Which will only help students convince their parents that an iPad Pro is the right choice. Parents will actually be more open to choosing an iPad Pro because it has the same or at least a comparable screen size to the average portable computer; it can write papers, research, print, etc. Plus multitasking is a breeze for productivity, and it is made by Apple. There won't be much this cannot do for most college students, and in many aspects, it'll be better for a lot of college students than a traditional portable computer. Harder to damage; quicker, easier, and less expensive to repair; plus with APP+, repairs will be much more affordable when and if needed.
Young adults purchasing their first computer with their own money, who have never really used computers other than in "keyboarding" class in high school have no desire for full computers (I know a few dozen of these people).
Older generations who never used a computer before, but have already been taught to use an iPhone or iPad will jump to the iPad Pro simply because it is familiar and bigger. Especially if they have less than perfect eye-sight.
In the long run, the iPad Pro is only $250 more than an iPad Air 2 with equal storage and connectivity features. Anyone complaining about the cost of this device should really consider the additions that this device has over the iPad Air 2. 78% more display real estate than the iPad Air 2, while maintaining the same PPI and battery runtime, greatly improved speakers, CPU, and GPU. Don't forget that iPad Pro can be used with Apple designed and manufactured accessories including a keyboard-case, and professional-grade stylus with multi-level pressure sensitivity and angular awareness. Two accessories not available at this time to Apple's other iPads, and both accessories that can help push this device into a category of its own in some cases.