David wants to replace his desktop and do all of his photo and video editing on a tablet. Leo says that the iPad with Lightroom is a great solution as long as he has Creative Cloud on the desktop. He can do some basic editing on the iPad, and then it'll sync the changes he makes to the desktop. That's what Leo does. If he wants to completely replace his desktop, then the Windows Surface Pro 3 is a great option. He'll want the i7 processor for it, though. And he should make sure to get the keyboard.
One thing he's going to give up when switching to a tablet PC is the stand alone GPU. But the native Intel graphics card will probably suffice. It may take a bit longer to render.