Evidence from Samsung Camera App suggests that Samsung will bring 8K video recording support to a future device, most probably the Samsung S11, which has a 108MP Camera.
Samsung S11 with 8K Video Recording:

When Samsung rolls out its camera app’s new versions, we will look at what the company is focusing on upcoming smartphones. In the first discovery, the Samsung Camera app appears to add support for 8K video recording in One UI 2.0 beta 4. This is likely for the early 2020 launch of the Samsung Galaxy S11.
As per the anticipation, this as the Exynos 990 SoC supports 4K@120fps and 8K@30fps video was revealed. Although the Snapdragon 865 has not yet been announced, the support for 8K30FPS is still rumoured.

To allow a phone to record 8K video, 33,177,600 pixels must be captured by its primary camera sensor. The Galaxy S10’s 12MP camera won’t cut it because it’s just 12,000,000 pixels. Samsung needs to use a higher megapixel count camera sensor that ties in with the 108MP camera rumour.
New features in Samsung S11:

The new View of the director will allow you to lock into a subject in perspective as well as “select who’s in the close-up.” It also allows you to “tap the thumbnails on the left to switch between camera lenses.

The Single Take Photo will start shooting to capture the scene in a series of pictures, and short videos” mode will allow you to spin your camera for 15 seconds, slowly, and capture a bunch of scene pictures and videos. After the camera processes all the photos and videos, you can see a selection of what it has just taken.
The other features are the Night Hyperlapse, Vertical Panoramas and some Custom Filters. As of now, there is not much information about them and more information might come out after some days.
For its upcoming smartphones, Samsung is working on many new features that extend existing functionality and make photography easier for everyone. We also provide apps from their phones to professionals who want more.