a warning in the line of fahrenheit 451 or 1984, this is a novel (perhaps written in reflective first person perspective by the star of the novel) about a post-modernist transhumanist society

over time more and more original human parts get replaced and also augmented by machines, because at each stage there are obvious surface-level benefits, while the subtle spiritual detriments go unnoticed, especially how they add up over the long run.
at the time of writing, people communicate digitally using imagery and/or other direct forms of semantics. most people have no lungs; they're replaced by something more efficient (maybe more efficient at combating the tremendous air pollution?)
the woman is somehow vaguely familiar with what it's like to breathe with genuine lungs, and longs for those days. perhaps she had them when she was a girl? perhaps she has her grandmother's videotapes from when *she* was a little girl? perhaps she has friensd who tell her what it's like?
the whole shebang could starts with implanting computers under the skin. do they interface with the visual apparati? do they store data over time, which is then shared when the person touches something or someone a certain way? alternatively they could start with external mind-reading devices, which take the thoughts and network them with others, interface with computer applicaitons like calendars, etc. , these are more sophisticated versions of the ones brain-reading devices that already exist now. eventually the devices might make it internal, and perhaps then they'll use more direct means to access the neural behavior.
organ replacement could arise out of political pressure in response to certain environmental threats (caused mainly by humans of course), such as air and water pollution, ozone depletion and maybe global warming.
she is relatively alone in her aspirationts to feel what it's really like to be a human. not totally alone, but those who think like her (and state it) are deemed radicals, and most people simply lack the level of relfection needed to see the state they're in, or the experience to have that perspective. this is illustrated (indirectly) by some of her dialog with friends, and perhaps some of her thoughts about those dialaogs.
have her ask her friend a question about missing the olden days, etc., which she kind of shrugs off, then the main character recollects asking her another question about something we can (today in 2010) relate to for which she shows equal superficial and yet believably typical responses.