well.. BD wise, you can certainly still buy a Premier system with a changer and load up all your Physical discs into a Kscape changer and archive them onto a hard drive.

Unfortunately, K-Scape does not have any 4k players in the current premier line and I have not seen anything about Premier supporting 4k in the future.

The Encore series Stratos should be available in the next couple months. However, you cannot archive your media with an encore system.
You can load it up into a changer.
You can buy a digital copy from Kaleidascape store.(these are the only files that actually are stored on the hard drive)
You can link the system to your UltraViolet account and Stream your material. (The system also allows you to buy digital versions of Media you already own through Ultraviolet)