Some Dassault products already display accelaration in G on the PFD.
In these aircraft, the expected Accelaration is provided as part of the Takeoff Data computation, but not often used day to day.
Time to 100kts used to be a stopwatch check used in my dim dark past.
A difference between calculated and actual times was a pretty good reason for stopping. Don't see it considered much in the civilian world.