Tim Moores wrote: A (not very good, but valid) example would be 64 bit integer and FP numbers. The effect of this might possibly be trumped by other factors, but it is a plus for 64 bit processors.
While technically correct, this example is not valid for the typical netbook and/or tablet use case. Folks don't do serious computation on them, they surf the web, send email, and watch movies. The watching movies part could do better on a 64 bit chip, but everyone has the graphic card handle video, not the main CPU.
Additionally, your argument only holds if the memory is 64 bit, and all of the memory channels, controllers and other paths are all 64 bit. Lots of microcontrolers designed for low power usage have narrow paths to memory to save cost and energy.
IMHO, if you want to *use* a tablet, get an iPad. If you want to play around with one, and if you can find one a lot cheaper than the Apple, go for it. But today, all of the competing tablets want to get the same $500 as an Apple iPad, and I don't see the point. At $200, the competition may be attractive.