What if William were gay?

As I sit here watching the royal wedding on TV, I find myself wondering what things would be like if Prince William had been born gay.

If Prince William were gay, would he have been able to come out openly as such and still be promised the throne? Or would he have been pressured into a sham marriage in order to produce the requisite image, heir, and spare?

I suspect the latter. After all, William's father had his own sham marriage, except that Charles's true love was another woman, not a man. Still, a sham marriage is a sham marriage.

I just keep looking ahead to the day when same-sex marriage will seem as outdated as the concept of a monarchy.