By 2030, we'll probably see a fair bit of discrimination against people who were born last century. That's when the first babies of the 21st century will start hitting their 30s and taking up management positions in our corporations. Also, since they're all grown up and the teenagers of the day will be born in that century too, any birth year starting with "19" will start looking really old, even if it's "1999". My "1979" will look like "stone age" to the neon-bright software geeks of the day.
Mokalus of Borg
PS - I'm not looking forward to that.
PPS - But then, who does look forward to feeling old?