If we limit the scoop to consumer computers, including Linux seems odd. At least in Sweden extremely few people are using Linux on their computers. Even with Macs it's less than 30%.

Can you clarify why big brands should switch to Linux for their consumer PCs considering that few consumers wants it?

I can't imagine a company pushing for tablets as general purpose devices for a lot of things... as a POS (point of sale) terminal, or even for standing sales reps, sure...

But real productivity is so much worse in line of business applications on a tablet vs. desktop. Screen size/space is king, and nobody is going to work on a 20" tablet... or give up half the screen to a keyboard. Let alone how tired will your arms be by the end of a day without a mouse for anything.

I know you can tap a keyboard/mouse to a tablet, but at that point, you've spent more money than a low end laptop or desktop, with worse productivity and output.

If I look at that market Apple is almost nowhere to be seen.

Here in Europe, Apple computers tend to be above many salaries, forcing people that really want to have them to use leasing.

So healthy European countries do have quite a few. Not so healthy countries white brand PCs rule.