No, life is too short to wait that long, at least for us. I think it depends on what stage of life you are in.
My son is 16 and will graduate in 2012, my Mom is 76 and doesn't feel she can do WDW much longer-it's too exhausting.
So, we are going next fall, then after that it will probably be only my husband and I going, unless my son jumps in on some trips.
If I had young kids, I might wait, but Disney is always changing.