On that day your position becomes relevant. Northwestern is a private university. This doesn't apply to any other school or the NCAA. I doubt we see the NCAA change their position, so if a private-run school opts for a union and those "employees" negotiate for payment, the NCAA will declare their program ineligible. Essentially the program disappears, so this issue is self-correcting. "Work rules" is their primary concern. The fact that they receive a scholarship for their schooling is the basis of why the NLRB ruled in their favor. They are receiving payment from the University in the form of free schooling, therefore they are employees and have a right to form a union.
The NLRB ruled that Northwestern players (thus far only Northwestern is affected) are employees of the University. I hope these student/athletes realize that their $60,000 a year scholarship just became taxable income. Be careful what you ask for.