Is the one in the picture the RT model? I have heard that that one is spectacularly useless unless you want to do exactly what MS have decided and nothing more due to the restrictions placed on it. "Proper" Win 8 will likely be better, but will be different in detail to Win 7. Biggest thing, as ever, will be that you will not be able to get drivers for long cherished hardware, despite the alleged compatibility mode, because you will not be able to load them in the first place. Over various systems that's cost me a perfectly good video capture card and a couple of scanners.
It was perhaps telling that about the first add-on program to appear was a mod to get rid of the metro interface and replace it with something recognisable.
I have had a go at Linux, but the level of geekdom required to do all but the most common tasks is an off-put. That, and a couple of windows programs that just don't have a worthwhile equivalent. The most important of these was my music centre program. I have a juke box program that acts like one - it shows the list of tracks in a sensible order, lets me pick from the list, and plays them. All of the linux ones give me all sorts of sorting and categorising options, but no easy picking and playing options. Over geeked.