I believe it will involve a lot of literal, rather than metaphorical, homosexuality.

The first generation to gain the ability to change to a new sex easily and cheaply and completely passing (on a physical level) will also start experimenting with new sex configurations, probably.  For the generation after that, it will be normalized, and manipulation of hormones at key points in development may used to guide sexual orientation towards bisexual or pansexual.

So yeah, gay cyborgs.