It is my understanding that all sports will become equivalency sports, meaning that partials can be offered; however, the scholarship limit is also the roster limit, so a school can choose to give full rides to every athlete.
These are NCAA D1 numbers:
Football: 105
Men's Basketball: 15
Women's Basketball: 15
Baseball: 34
Softball: 25
Cross Country: 17M/17W
Track: 45M/45W
Volleyball: 18M/18W
Tennis: 10M/10W
Golf: 9M/9W
I got these numbers from a recruiting service, so I am not certain they are all correct. However, the basic concept is correct. Roster limits and scholarship limits will be identical in each sport: if your sport has a scholarship limit of 15, that is also your roster limit. You will be able to choose to give all or some of your players partial scholarships for budgetary reasons, but as a practical matter, if you want good players, you will have to find a way to get them all money equivalent to a full ride. The walk-on concept will likely be dead at the D1 level, as the partial scholarship will probably replace the walk-on system.