I also went to the Property Expo and heard Bernard Salt's interesting talk on Baby Boomers and the Seachange phenomenon. Certainly the coastal drive by the BBs will let us ride the wave for the next say ten years but be very careful after that. You may find they are a bit stagnant as the next generation doesn't have the same dreams. Having just bought down the coast, my children are looking at me like I have two heads - the beach is boring unless you have a group of 20 or so friends, mobile phones have to be "in range" and you better have satellite at least for the computer hook up otherwise they turn pale, pasty and suffer acute withdrawal symptoms. He also talked about the Manhattanisation of Generation Xers who have been brought up on Seinfeld, Sex in the City, Frasier and Friends, all devoted apartment dwellers, not the Brady Bunch or My Three Sons (God, I'm showing my age now), not to mention being able to wander at will on Gilligan's Island or heading off to the "Lower 40" on National Velvet. Their dream is the inner city hub, glistening, high tech unit. If you think we are overdeveloped and oversupplied in the inner city, Bernard pointed out that the densest area in Sydney is Kings X/Potts Point with about 18000 per skm. Compare this with Manhattan at 59,000 per sq km and I think you will see where we may be headed. By the way, you have to virtually sell yourself just to rent in Manhattan let alone own anything.
In brief, I'd look coastal for a few years within 2 hours of major capital cities but buy now not in ten years, then maybe well-positioned, 5-10 k of CBD or near water, townhouses and houses with small, no maintenance courtyards for the over fifties who have given up on the coast and moved back. They will want access to water and parks nearby for the grandkids but not the suburban block particularly. That's my gut feeling.