Do desktops even matter then?
If argue for ease of use - then you elimate desktop computers out right. I believe the average user and clerks will be using appliances, not Windows soon. The desktop market will soon be the sole relem of developers, even game consoles like the playstation 2 have all the average non developer needs.
Linux should never water it self down for non developers! Unices was here long before Windows , and will be around long after Windows. People need services and dependability provided by these work horses. The reason UNIX will always exist is the fact that it's modular and lends itself to be a developers choice - when people move to appliances it won't be on Windows CE either.
With items like belttops from IBm running Transmeta chips coming... just my educated guess from following IBM. Linux has little to fear from Microsoft in the belttop/laptop market either. FreeBSD and Linux are quickly becoming embedded operating systems of choice. Dependability is to import in embedded machines to compromise.
Well, I got off on a rant - but remeber who told you about the IBM Transmeta belttops frist. =)