if its going to be removed will unity replace it with something better? I like the resolution dialog.
Probably not. See discussion here: https://forum.unity.com/threads/the-display-resolution-dialogue-has-been-deprecated-and-will-be-removed-in-a-future-version.670798/
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UPDATE: It has been completely removed. The useless Release Notes don’t even mention when exactly, probably in 2019.3.
CLI parameters still work, so you can workaround it with a BAT file…
Or use an external package, such as: GitHub - CodeSmile-0000011110110111/UnityResolutionDialog: Replacement for Unity's built-in resolution dialog (aka Screen Selector) that was removed in Unity 2019.3. Works both up front (simply make it the first scene) and as a popup dialog (default key: ESC). Intended for development / testing purposes but can also be used in production.