Good points. I too have had use of both tablets (iPad 2 and Surface RT), though somewhat limited for the Surface RT and conclude there is room for both; which is why I don't think an "apples to apples" comparison can be made between the two. A mobile professional like me will likely opt for both for the reasons you stated. However, my choice of Surface will be the Surface Pro to replace my 3lb laptop for everyday mobility and travel. Both units will likely find their way into my totebag.
The RT is solidly built, the integrated kickstand, native MS Office (even with its limitations ie no Excel macros), the USB port and the microSDX which, at some point will be capable of holding terabytes (probably at a substantial cost) are the big selling points for me. Surface scores big as a result of these features, regardless of any current deficiencies which, I believe, will be ironed out over time and use. Simply the ability to hold my multimedia collection on a 64GB microSDX or Microsoft's cloud without sacrificing hard drive space and the ability to use a mouse with a tablet are huge.
There is definitely room for both; like all mobile devices, it depends on the individual usage patterns--which should be the drivers for any mobile device purchase.
Keep Up with TechRepublic