You may be able to run two apps side by side on the iPad now, but you wont be able to instantly alt/cmd+tab between the fully capable PC versions of Photoshop,

You may be able to run two apps side by side on the iPad now, but you wont be able to instantly alt/cmd+tab between the fully capable PC versions of Photoshop, Illustrator, Lightroom, Chrome running 50 tabs, 500 page Word document, while rendering something, while powering 2 or 3 external monitors if needs be. It's a completely different paradigm in terms of productivity for artists and so on.