The iPad can zoom in and out so quickly, it becomes a far better solution to have a constant 'brush size', but use zooming to effect the difference between fine

The iPad can zoom in and out so quickly, it becomes a far better solution to have a constant 'brush size', but use zooming to effect the difference between fine and broad strokes on an image [1]. Several of the photo manipulation apps on the iPad already do this and it's far superior to selecting brush widths, to say nothing of obviating the precision problem [2]. In short, the screen size of the iPad is more a roadblock to its being a replacement for desktop photoshop. Though its portability, comfort and the ability to focus would be a huge advantage for anything in the sketch/draft/mockup stages of work. And the lack of (true) pressure sensitivity makes the iPad a non-starter as a wacom-replacement. I suspect this could be solved by a bluetooth stylus. But the iPad alone is simply insufficient for many wacom tablet uses. [1] e.g. the 'brush' always applies the selected effect to the area of the image under your finger. If you wanted more fine-grain accuracy, you zoom the entire image, so that the number of image pixels covered by your finger is reduced. [2] Which, at a fixed resolution, absolutely was and is a problem.