The really sad thing is that Rob Halford deliberately chose not to come out publicly when he was Judas Priest (i.e. in his first stint with the band) for fear that his sexuality would be harmful to the image of the band, and subsequently to their marketability. He specifically mentioned in interviews that he didn't feel justified in potentially threatening his band mates' livelihoods, hence his decision to reveal his homosexuality during his solo career.
As it happens, I think most long-time Priest fans already knew he was gay, and moreover, couldn't care a jot.
I think, however, that his fears of the negative ramifications were justified, even in an industry which has a long history of not persecuting or boycotting its members solely on account of their sexuality.
What a joy it is nowadays to live in a completely different world, when, aside from those with a particular agenda to follow, the vast majority of folk don't so much as bat an eyelid when it comes to matters of another's sexual orientation. Even more so, that gay guys and gals no longer have to adopt the persona of a parody of their stereotypes to satisfy the expectations of others.
Live and let live.