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That's dumb and you know it, it's understood that a desktop includes a keyboard at minimum as a component. When they start selling you tablets with no screen let me know.
You said the magic work so many times: reading. Try to use a tablet for software development, graphic design, creating 3d models, writing a story, creating a presentation, mixing down audio and / or video, or crunching numbers in a spreadsheet. Touchscreens so far are terrible at these things, you'll want a mouse and keyboard (at least a keyboard).
So you're ditching the Windows frying pan and jumping into the tablet volcano? Just load a Linux distro. Tablets can't get real work done without add-on peripherals anyway.
No most people in the US who are not enthusiasts will buy a name brand OEM PC from a Best Buy or Staples or maybe even Walmart. People who build their own rigs or even are interested in custom ones are enthusiasts.
Most gamers, like most people, don't have the skillset needed to write a compatibility layer between Linux and Windows applications. Hell, most *developers* don't have that skillset. By your reasoning people who don't like iOS or Android should have to role their own custom phone and OS and market it, otherwise they're just 'whiners'.
Just got back from their site, the only download is a DEB package for Ubuntu. Where's the RPM and shell installation packages? I feel insulted that we finally get steam for Linux but it only works on Ubuntu.....
So when everyone is playing Vega Strike and Wesnoth on their i7 + Quad Sli setups Linux will win. The problem is there is a massive backlog of games that are never going to be open sourced or ported that only run on Linux. I for one *like* some of those games. Carmack was right when he said that getting WINE up to spec was the most important project for Linux.