Are any companies paring the Ion with Via Nano? I would have assumed most Ion platforms would still use an Atom processor.
The problem with All-in-Ones is upgrade-ability, there is none. If I'm going to get an enclosed, minimally upgradeable computer running an underpowered processor, it would be a netbook, at least those are designed for portability.
The only thing most of these Atom/Ion all-in-ones have is a touch screen, which could be nice, but I would expect more tablet/touchscreen netbooks in the future.