I just recently purchased a new Surface Pro 3, and love the tablet-laptop, but have to agree that the apps in Metro are a complete 'waste'. I first tried to go the route of using apps, and had many installed, but then they started acting up. Would act like they are firing up, then the screen would go away, back to the Metro screen. In Desktop mode, in the taskbar, it showed the app open, but when clicked all it would do it appear, then go away. I've tried everything, but can find no answers.
So, I uninstalled apps, then load the programs as I did in Windows 7. They work great now. So, my experience with the app store has been very, very dismal, and I will not go back to it. Not until the problems are solved. With this Surface 3, I can load any program I wish, just as I did in Win 7.