The common refrain has been that tablets are for consumption and that laptops are for productivity, and never the twain shall meet. But it's a different world today, and now Apple and Google want to cross that bridge, too, into Microsoft territory. Apple with the iPad Pro, and Google with the new Nexus.
I've wanted to write this for some time, but hadn't because there was no solid data to back-up my assertions. I do now. This is about why I believe the future of tablets (and by extension, computing) is 15-inches in display size, perhaps even 17-inches.