After installing our corporate Windows 8 volume license build onto my ATIV, I was not able to install S-Note (or any other Samsung app) from the Windows store. After putting far too much energy into trying to find an answer, here is the reply from Samsung engineering (via the enterprise sales channel at Samsung):
"Metro apps can only be installed during master image creation process using designated tools. Of course, developers can install Metro apps locally, but the system needs to be in test mode, and developer environment needs to be setup too. So, in a nutshell, we cannot deliver Metro apps to other users for general use."
I hope they fix that. It seems more likely that the code they use to establish that the PC is an appropriate Samsung model compatible with their app (quite reasonably so non-Samsung PCs can't install their software) is buggy. They must be looking for the Windows build they created rather than at the hardware type. I don't believe the correct people at Samsung understand what's happening presently. This practice is costing them corporate business.
If their corporate policy is that enterprise customers, virtually all of which will install a corporate build of Windows, are not able to use the value-add software like S-Note then it's on to another manufacturer.