The Detroit News:
Michigan’s high school juniors will be required to take the SAT college assessment exam instead of the ACT next spring ...
Quoted in the article, here's Wendy Zdeb-Roper, Executive Director of the MASSP:
Colleges and universities have not even seen the test yet and will need to re-norm their acceptance standards, since it will include a new scoring scale ...
Later in the article:
Jim Cotter, Michigan State University’s director of admissions, said he expects the impact on the admission review process will be minimal.
By my measure, the gap between "re-norm their acceptance standards" and "the impact ... will be minimal." is pretty huge.