http://ifixit.org/blog/7475/repair-coalition-wins-exemptions... is a bit more clear on the types of things that will be allowed under this.
As for the specifics of jailbreaking:
"The Register also confirmed that the exemption for gamers should not extend to jailbreaking of console software because such jailbreaking is strongly associated with video game piracy."
https://www.federalregister.gov/documents/2015/10/28/2015-27...