The ultimate goal of Windows 8 metro and the Surface/Surface RT is that Microsoft wants a big chunk of the apps market. You know the miniature hastily built things masquerading as actual applications, most of which are just thin wrappers around a web site. They saw Apple making money here and they decided they needed some of that cash. The thinking stopped at that point, they didn't do further research to see what sorts of things were making the most money, what features were most in demand, what would happen to their bread-and-butter backwards compatibility, or even figure out if customers were even happy with Apple's locked down gulag of an app store. They also see Google raking in the big bucks by grabbing lots of data, and they want a piece of that pie too.
So the whole design if everything revolves around Microsoft making their own walled garden and data collection center. Everything in Windows 8 favors the store. They've taken the ideas from Apple and Google and run with it, being even more restrictive in the process.