Intel based Surface tablets would, of course, offer much greater functionality than iPads or Android tablets. The question is how they measure up on usability, battery life, weight, and not heating up.
If all that is working fine, then a higher price surely would be justified. Although it would be a smart move to price them slightly lower than iPads.
As for Windows RT ARM versions, we really don't know enough to pass judgement. They do come with full fledged MS office versions, which definitely is a great plus.