You'll have grandkids by 2020? 2030 at the latest.
Peak oil will be ours, and it won't be fun.
2030 at the earliest, since none of us have kids yet, and it would take at least 20 years for them to have kids. And strictly speaking they would still be infants and wouldn't care about oil, lol. Until they would need to be driven to kindergarten/daycares on a regular basis? One parent will probably just stay home, to prevent having to commute seperately from the spouse.
You forgot heat wave issues, communication problems (geomagnetic disturbances, solar flares, check the Solar New thread: 2012 will be the solar maximum), and the Apophis meteorite that will come dangerously close to earth in 2029. We don't have the technology yet to ward it off if gravity betrays us and it ends up in decaying orbit over earth.
Before that, though, like I said the heat issues, and UV index making it a bad idea to be outside for a prolonged period of time, jeopardizing people's jobs in the outdoors, construction, fixing roads,... More cancer, other diseases... True about the antibiotics issue, we gotta put our hopes in nanotechnology. In theory it will provide a much more effective way to combat cancer, for one. Crystal-shaped objects designed to attack only the cancer cells, and not all cells which is what happens with chemotherapy.
I do think it's sad so little has been done about the oil problem. I watched an interesting documentary last week about O2 credits, not a bad measure but it basically allows companies/industries that are harming the planet and using a lot of fuels to buy off these credits so their business can continue the way it is. Some businesses try to improve themselves, but there should be more sanctions. Everyone is just all being selfish and trying to maintain their profits. Too few people worry about life even 10 years from now, which I find odd. I'd understand if it was a 50+ years question: we'll all have retired by then. But even then we might like to enjoy things the way we're able to nowadays.