As to whether Amazon is going to make this an ideal platform for web apps where users can add them to the home screen with a custom launch icon and splash screen, with a wonderful GPU accelerated browser to run these rich client apps super fast, and a nice cloud service to speed up what goes over the wire for service calls--I would guess not.
Amazon might even be subsidizing the cost of these tablets, and they'll certainly be spending a lot to keep the Silk cloud services going. With that in mind, it seems that the last thing Amazon would want is for large enterprises to buy these as cheap tablets to run their business apps and not buy stuff from Amazon. In that case, Amazon would be giving them a free ride, which is not good business.