Samsung is one of, if not the leading company on the planet when it comes to display technology, which is why it's not surprising when a patent is discovered for a crazy new revolutionary design change.
Patents like the one mentioned in this article are filed all of the time as it is safer for a company designing new products to ensure they already have their bases covered in terms of rights before the product becomes extremely popular and competitors attempt to mimic it. Unfortunately, since so many patents are filed and discovered, they aren't an indicator of what a company is planning on releasing, but they could be viewed as evidence of what a company is working on in its research and development labs.
The above Samsung patent describes a tablet with an extremely intriguing design as it features a horizontally expandable display that can be resized based on how it is used. For example, the screen can be pulled outwards in each direction to make the display larger, which would be used when a keyboard is attached to the tablet. The user is also able to shrink the tablet down so it can be used in one hand by folding it.
"This electronic device may comprise a flexible display, a first rolling actuator configured to extend the flexible display in a first direction, a second rolling actuator configured to extend the flexible display in a second direction opposite to the first direction, and at least one processor," describes the patent