I'd revise my career options as a Mac dev. As for the Macs, I'd keep using them until they die. It's not like they stop working the day Apple dies – in opposite, when Macs stop working Apple could die 😛.
My next computer would be a one that doesn't have too much crap I don't want and is well supported (drivers, 'clean' Windows installation DVD). I'd install Windows 7, Linux and Chrome OS.
Then, when the iPhone dies, I'd replace it with an Android phone. (Or the Palm Pre, if it ever gets released here.)
I'd miss the community. Sites like these, and the other devs.