Android is a little quicker than iOS considering how long they've been on the market, but they're close enough. I'd give the tablet at least 2 years of official updates from release with a solid dev support from cyanogen for as long as they can hack updates onto it. If Flash is important to you, you might want to think about another tablet and upgrading to 4.1 because they just announced that there will be no flash support for 4.1 and beyond.
Seems like the Android OS is being updated as much as Apple changes the iPhone. Now my only thing I'm wondering is when it will no longer be updated. Still tempted to order. It all depends on when I can get a Galaxy S III. If that screen is good enough for me then I wont bother if I do want the larger screen for comics and books then this will be ordered. How are comics on 7 inch tabs? Can you read the page with out zooming in on it?
As for comics on a 7 incher, you could read them in portrait mode, but landscape will be much easier. Books obviously won't be a problem, but a 10 inch is far better for comics.