Apple has made it clear that their vision for tablet computing is limited to mobile devices, essentially PDA's, and they have no greater vision of how creative people & professionals will work more efficiently going forward into the future. ...or they can see it, but have decided that like every other area of the once thriving "pro" product line, it's not worth the investment. They'd rather sell short lifecycle watches and phones and cars to teenagers with disposable income.
And so, it falls upon, of all companies, Microsoft, to grab the baton and make the bigger strides pushing computing forward again. ...and we know how that goes.
This will be the biggest missed opportunity for Apple to lead of Cooks career.