Mouse Pointer fur windows taken from XBOX ONE UI

In Windows 8 swipe in from the right edge or move the mouse pointer to the upper right corner and select settings from the charms bar while a game is open.

It's like the mouse pointer on your pc or laptop. If you make the settings to where the mouse pointer shows trails then this is a good example. The host is the mouse pointer and what you're shooting at are the trails and not the mouse pointer itself. That's
why it's not hard hitting a host that's running directly to the north or south of you but when it's in another direction it's tricky.

I appreciate you for sending us the photo privately. That helps me further isolate the issue.

The white dot you’re seeing on your screen when casting from your Samsung Galaxy Tab A7 to your Xbox One using the Wireless Display app could be a cursor or pointer from the tablet that’s being mirrored on the TV. This can happen if the tablet is interpreting the TV as an external display and showing a mouse pointer.

Here are some steps you can try to resolve this issue:

Check for updates again:

Make sure that your Xbox One, the Wireless Display app, and your Samsung Galaxy Tab A7 are all up to date.

Disable mouse pointer on your tablet: Some tablets have an option to disable the mouse pointer when connected to an external display. You can check this in the settings of your tablet.

Xbox allows keyboard and mouse, but it's the developer that builds it into their game. You can change pointer speed in settings, Devices & Connections, Mouse.

From the IGN video it looks like they have taken older windows UI, and windows 8 and merged them together, it does look interesting IMO.