I understand your sentiment, but I think you're choosing your examples too carefully. Other singularity-era technology could let us breathe underwater, or increase our muscle and bone-density ten-fold, giving us superhero like strength. I think that's pretty wondrous.
My reading suggests that we assume this technology is developed and ready to go. I too could see, once we pull out the singularity dust, a future where extensive body modification is possible, where my vision is trivially fixed to have larger spectral response and my skin is a flashing display of whimsy. But, that still supposes quite a bit.
Moreover, I'll take your breathing underwater example to point something else out, as well as the muscle/bone-density one.
We have that technology--some sort of Self-Contained Underwater Breathing Apparatus; a SCUBA, if you will. Similarly, we have ways of increasing muscle mass using steroids and other additives.
And you know what? This is largely the domain of the rich, or of those who have money and time to spend on frivolities. So much of the singularity tech that I see bandied about seems to fall very much in that camp (see also: http://archive.picturesforsadchildren.com/93/ ).
I'd much rather see better distribution and use of existing technology than wait for The Future--especially when it's presented as Everything's Possible With Science!
(Speculative fiction has done a decent job of picking apart some of threads of these sorts of futures...I'd suggest reading some of the Dangerous Visions anthology or more recently Paolo Bacigalupi if you'd like a properly melancholy commentary on the future with Science! There's this annoying problem of the many billions in poverty that somehow always gets waved away.)
