humans will never evolve. Unless we evolve within the next 1000 years, i believe we will see genetic engineering and/or mechanical hybrids.
As far as evolution only our brains will need to increase in volume which will most likely be offset by the use of computer memory or power to hold our intelligence.
I say this because there is a limit to how much glycogen can be absored by a human to feed the brain, let alone a super massive one. Let alone the implications of a women having hips large enough to carry the foetus with the brain.
Also, computers and electronic seem to be only thing small enough and power-less (energy wise) enough to be able to hold our intelligence, memory etc.
In medicine we could make ourselves immortal, yet the implications of that is that the human brain has only a finite amount of memory (try remembering what you had for breakfast on 30th may 1994). So computer memory will be the only thing to keep us 'sane'.
Anyways, i understand my theory is based on a anarchist universe where i assume no laws will exist to place limits on humans.