Chris Wren of Mondolithic Studios posts an interesting article which contends that transhumanism isn’t a distinct movement or philosophical school. Rather it is simply one manifestation of the myriad of ways that human beings are technological. See Mondolithic Sketchbook: AREN’T WE ALREADY TRANSHUMANISTS?
Certainly this would fit with claims that transhumanism is a useful label from promoting certain ideas about humans and technology, but that it is little more than that. See also: Greenflame: Is transhumanism passé?