Add a useful tool that has disappeared
Using the Pixel Inspector—Help | ArcGIS for Desktop
Did you check Raster Inspector in ArcGIS Pro 2.0 SDK (GitHub).
arcgis-pro-sdk-community-samples/Raster/RasterInspector at master · Esri/arcgis-pro-sdk-community-samples · GitHub
Looks Pretty much the same.
This is not very useful if you don't have access to SDK, which requires Visual Studio to be installed. Useful tools that were available in ArcGIS should be made available in Pro without having to install resource hogging SDK's and third party tools that may or may not be actively supported.
I'd add that perhaps this should be combined with ArcGIS Pro - Eye Dropper Tool
Retrieving data ...