I don't know if it is really scrapped or, not. But as per available news/data the project is still on.
Army awards Microsoft $95M for additional IVAS 1.2 headsets, virtual trainers | DefenseScoop
Army awards Microsoft $95M for additional IVAS 1.2 headsets, virtual trainers
IVAS’ Campaign of Learning Ensures Development, Production and Fielding Remain on Track | Article | The United States Army
IVAS’ Campaign of Learning Ensures Development, Production and Fielding Remain on Track
I think in future there will be humanoid robots to be used for combat , so the direct intervention of humans will be less. But still the data-fusion & ultra fast protected communication will be the key where such systems may be useful as control interfaces.