It always amazes me when someone comments on a product, that at this point isn't even being acknowledged by the company making it. I realize this is a rumor site, but how can one comment on the usefulness of a product when we do not even know one thing about the product, except it's supposed size.
You ask about the usefulness of a 13" touchscreen, yet Windows has even bigger touch screens in their latest computers and laptops. Of course, one is stuck having to use the disastrous Windows 8. Which has not made those products any more useful.
Now many people infer that the ipad and other tablets are not for productive work, and yet, in my business, I find the ipad very productive.
I have sales people which use their ipad to sell and take and enter orders.
I have secretaries who use their ipads for all sorts of communications, including email, and Warehousing staff which use ipads for pulling and shipping orders. So, if you would like to continue to stick with those cliche's because it makes you more comfortable, feel free. But for me, using ipads have been very profitable.
The only thing I use my macbook pro for anymore is to house my itunes library.
If they make the ipad pro more powerful, with a strong feature set, I envision that there will be lines out the door, and people camping out, prior to their release.