Today's USCIS memo about Green Card AOS (adjustment of status)

This is major if it survives inevitable court cases:

LINK

LINK

Basic summary is if you are in USA, either legally or illegally, and are trying to get a green card, you have to go back to your country and get approved there at a US consulate. You can't get a green card approved while remaining within USA (that process of getting a GC from some other visa/status while remaining in USA is called Adjustment of Status).

Applies to H1Bs as well, but not enough details available yet about how this will be enforced. Especially for H1Bs from India, this is a big deal as US consulate interviews in India are hard to come by.