Speaking as a pretty heaven Photoshop user, I just came across a much better solution than the Surface Pro. An Atom W8 Tablet.
Take this Acer Iconia w510 as an example,
http://www.carrypad.com/database/Acer/Iconia Tab W510
It has a 10" 1080p screen, so that matches the Surface Pro,
It has Transformer style dock, which provides 18 hours of run time and an usable keyboard. Weight is unknown, but I assume its comparable to Transformer's 2.6 lb (w/ keyboard)
Now why don't I just buy an Ultrabook? I can't justify an 1000+ purchase. I don't actually use Photoshop to make money, I am just a hobbyist who process photo a lot. Plus if I want to spend that much I would have brought a MBA.
And what about iPad? It doesn't run real Photoshop so its out. An compare to a Netbook? This one has a detachable screen so I can actually use it on a roadtrip. I can maybe dualboot Android and have access to much larger collection of touch screen consumption apps. At night I can boot it in W8 and use Photoshop to process photographs. The more I think about it, the more I like this hardware solution than anything else.
Hopefully Acer will offer a version with better IPS screen. But hey its Acer, I am sure you can get one for under 400 by Black Friday. If its that cheap I can live with a crappier screen.