I think the author failed to understand one thing: there are will be 2 kinds of Win8 tablets: x86 and ARM based. The x86 tablets are essentially full-blown PC

I think the author failed to understand one thing: there are will be 2 kinds of Win8 tablets: x86 and ARM based. The x86 tablets are essentially full-blown PCs, to which you can connect mouse and keyboard and they compete with netbooks, laptops and PCs, so the Windows license for them will be probably $90+. The license for Win8 on ARM tablets will be much cheaper ($10-$30), because they compete with iPads and Android tablets.