Originally Posted by HarryT
But they aren't sold as open devices. It would be a very different matter to have one manufacturer's reader and no other on an open device.
That seems a bit chicken and egg.
The Nook Color isn't open because it only supports one reader application, and because it only supports one reader application, it isn't open. The Nook Color does support the installation of a limited number of non-reading applications from B&Ns own app store.
If, for example, Amazon had chosen not to allow the installation of any competing reader apps, there would have been no competition problem, you would just categorise the device as not-open instead.