Reviews that compare the Surface Pro to the iPad are superficial.
The Surface Pro is a PC that will run Photoshop, TurboTax, and so on.
The iPad is a device that essentially uses the mobile-web system. And very few applications are allowed to install on the iPad. Instead the iPad must go to a website for an application run.
The Surface Pro is certainly headed towards Intel Haswell for battery life improvement. Or it might drop Ivy Bridge completely and go to quad-core Atom in 2014.