Is 4K streaming supported?

Yes, the DStv Explora Ultra supports 4K streaming. 

4K streaming requires connection to a 4K capable TV (and/or AV receiver/soundbar), the availability of 4K content, the necessary subscriptions, and high-speed uncapped internet. 

Selected 3rd party apps on the DStv Explora Ultra offer 4K streaming content, subject to availability and subscription terms. We recommend customers check the line speed recommendations from the individual suppliers. 

MultiChoice does not yet offer 4K streaming, though this may change in the future.