The surface pro 2 looks like a great machine. But, if you want a tablet... for only a tablet the iPad Air is probably a better choice. And at 1lb it is probably light enough to use as a full time reader too... (granted the Paperwhite is a bit less than 1/2lb.)
However, if you want a single device that can be a laptop, tablet, desktop the Surface Pro 2 is an excellent choice. With the dock I expect it would be even sweeter, but I have no idea how much that will cost. You can get a USB dock like this one
http://www.amazon.com/dp/B008N06I2I/...=IY74KPNAWE9C7 . the nice thing about it is it isn't specific to the Surface Pro 2, but bad thing about it is it isn't specifically made for the surface pro 2.
Whether to upgrade from Surface Pro to Pro 2 is probably a personal choice. The Pro 2 does come with two years of 200GB of Skydrive space, which would cost you $200 if you paid for it out right. It also comes with free international Skype calling.. which is nice if you use Skype for that. The 75% increase in battery life is probably the biggest reason to upgrade. So, if you are a road warrior and take a lot of long flights you will probably certainly want to upgrade. Granted, you could get the battery keyboard thing, but that will also add a few pounds to your carry on.
My biggest issue is.. I want a device I can use while watching TV (I do most of my "work" on my desktop with dual 24inch monitors and 16GB of RAM). I currently have a 13inch macbook. I'm not sure if I could replace it with a 10inch device... that just seems too small. So, I will probably get an ultrabook with a 13/14inch screen. I'd really like a mac book Air or Pro, but probably can't justify spending that much if all I do is surf the web while watching TV.
I guess none of this has to do with "E-Book Readers" but I am happy with my Kindle Touch and while I would like the new Paper White 2 I'd rather put that money to a new laptop or tablet.
BOb