If you wait for newer and faster hardware, you'll wait forever... but I'm inclined to this time. It's not been very long that netbooks using the nVidia Ion chipset have been out--but now, the claim is that there will be systems using the Ion 2 in Q1 of 2010. The Ion 2 will work with the next-generation Intel Atom chips, the "Pine Trail" version.
But on the other hand, the ARM Cortex A9 netbooks will be coming. What to do, what to do?