But you cannot deny that some people would think of such a mode of transportation as ideal. =)

I’m somewhat adverse to ‘smart-thingies’ as you call them, because I really don’t like the idea of carrying an always-on GPS with me. We’ve heard of Apple’s crimes, storing information on users for prolonged periods of time. Android yes, but to a much lesser extent.

I hate even carrying a symbian cellphone around because I’d rather contact people on my terms. I do enjoy anonynimity.

Personal opinion aside, each computer you listed is a tool to get a certain job done. The general all-purpose PC is becoming less “all-purpose” and more “general-purpose”. You can scale it a bit, make it a small server, small 3d development or audio studio, can make skype/voip calls, can take notes, etc…
But a desktop is not mobile, and laptops are hard to use as phones and generally do not include touchscreens.

I wouldn’t use Google OS if I could help it, but I can’t help but admire their technical strength and the creation of valuable tools for IT. Something M$ has missed for years.