In reply to The Lemming:
> (In reply to Mr Mark Stephen Davies)
> [...]
>
> Bollox
>
> Show to me that mac is better than PC at editing.
I think that the problem with PCs for photo editing is that the standard monitor you get with an off the shelf PC is a piece of crap. My sadly dead 2004 vintage powerbook had better colour reproduction & contrast than my fairly recent think pad, and thus made a far better photo editing machine.
Apple tend to ship good monitors by default, so they are better out of the box for photo editing than most PC hardware.
If you spend the money and get a decent screen, then take the time to calibrate it then a PC can be at least as good. When it comes to fundamental capabilities of software there is almost exactly nothing in it.
Anyway, on the tablet side. I haven't looked closely enough at the ipad screens to say, but there's no reason you couldn't get a fairly capable image editor. Biggest hurdle I can see is the old fat finger problem limiting accuracy but that goes away if you can use a stylus.