Something with a decent HID will always be around. It might be a tablet with a keyboard and mouse but it will always be around. The platform to consume content will relentlessly evolve but content creation has a pretty standard set of requirements for those humans that do it. This paradigm will drive the PC market to the niche where it might belong. Stuff that is truly creative and commercially viable generally isn't produced on an ipad and uploaded to youtube for your 31337 friends to fawn over. Yes, the bar to create this kind of stuff has been lowered but it still requires actual talent to do it.
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Tons of outsourced helpdesk available these days. We use it to provide 24x7 to our customers that need it.
This is always a tough debate. We've (well, the US) spent the past 60 years dismantling infrastructure in our cities and urban corridors that we're now rebuilding at tremendous cost. "Superior" technology replaced trains and street cars and half a century later we're busy trying to get that infrastructure back b/c cars are hugely inefficient at transporting large numbers of people,. Well, at least how they're used these days...maybe we shouldn't actively trash the POTS system...
I don't know how well Dell is doing at the service biz.