One minor change already: 32nd St. S. near the Arlington part of Potomac Yard/Crystal City will close permanently next week.
https://www.arlnow.com/2016/01/19/32nd-street-to-permanently-close-next-week-for-new-art-facility/
The street is only about 50 ft. long. It connects Rte. 1 with Eads St. I’ve never had a reason to ride on that exact street. It doesn’t directly connect any bike-specific areas. If you take that street, you have to cross Rte. 1 or ride along the sidewalk on Rte. 1, neither of which are pleasant experiences.
Perhaps some people use that small street. But after next week, they will no longer able to do so. The street is marked in blue as an On-street Route on the Arlington bike map.