Still a tough one, I think the specifications and the price of the PS4 are better. But I like the Xbox One exclusive games (Titanfall and Rise: Son of Rome) more. So for this reason I'd have to go for the Xbox One after all. And this is exactly why I don't like consoles, because of the titles that are only available on one of them and not the other.
About the one click mouse... yes, it sounds strange for people who are used to using (at least) two mouse buttons. However, for new users one button is simply a lot easier for obvious reasons (because there's only one button). Apple has always been focusing on usability and making their systems as intuitive as possible and that's the reason for the one buttoned mouse.
Valve is the company behind Steam, which is 'a digital distribution, digital rights management, multiplayer, and communications platform' (Quoted from Wikipedia). They've recently announced SteamOS, Steam Machines and a Steam Controller. Here's a short explanation about each of them:
- SteamOS: An operating system, optimized for gaming, based on Linux. More and more developers are starting to make their games available for Linux and with SteamOS this will only increase.
- Steam Machines: A small size PC for the living-room, running on Steam OS, which can be modified as much as you want.
- Steam Controller: A controller which can be used either with your existing PC or with the Steam Machines.
I'd definitely recommend you to read more about it. I personally find these developments very interesting.
Here's Steam's own page on which they announced these three products, you can click the circles to access more information about the three things I mentioned above:
http://store.steampowered.com/livingroom/And here's an early review about the Steam Machine, SteamOS and the Steam Controller:
http://www.theverge.com/2013/11/4/5063760/we-try-the-steam-machine-valves-video-game-console-of-the-future