Okay, I slept through the night and missed a bunch here. However, I'd like to jump in and point something out about the Game Apps. Laura, you were asking would high end gamers be able to get high-end games (like XBox does) as in-store apps.
Yes, they will. And the new DirectX 12 will give them more power to do more with their games. It is definitely possible. The "Requirements" list for some apps may just have to include processing power. Perhaps "minimal graphics hardware should be" and so on.
Yes, overclocking will still allow you to run store apps, as long as the overclock is stable. I've done a fair amount of overclocking on a liquid cooled system I had until recently. It was on Windows 8.1, and I used store apps with it, though none required the processing power I had.
Yes, I had a system liquid cooled and overclocked up to 5.8GHz with no stability issues whatsoever, with 3 high-end graphics cards.
If you can convince people that are hardcore gamers and overclockers that are always tinkering and upgrading hardware to use apps instead of the desktop stuff, then you've accomplished a lot. If Microsoft will make Xbox One games as Windows 10 Universal Apps to where they will run on supported hardware and run on either PC or Xbox, then they will get that following for sure. Of course, those apps would not be truly "Universal" as they would require x86 architecture to run and won't run on ARM or low end processors or graphics. Well, they might run on low end x86, but not be playable.
I think MS needs to push that particular envelope a bit. Make Minecraft a Universal App as soon as is possible. Think about playing Minecraft on the desktop, then continuing the game on your phone. That game is a no brainer to do as universal app. That one app alone will get a lot of people to start noticing store apps.
I think the appeal of store apps is much better than the appeal of desktop apps to the average consumer for another reason as well, but it will have to be marketed to let people know this. Security. How many times have people found the program they wanted, only to download a virus? It's the number one way people get infected it seems is when they are trying to install a program that they obtained from a disreputable source.
People who will never want Store Apps: Part 2
There are people you will never convince to use the store, and they will fight it no matter what, however. These are people that obtain their desktop apps from "less than reputable sources" in order to get around paying for the programs. They want the full version of Photoshop, and they want it for free, so they go to a pirate site and download it as a torrent or whatever, then they install the cracked version. You will have a difficult time convincing these people to use a legit source and actually pay for the higher end apps.
There are also a lot of people that do not want to see those high-end Xbox One games on store for PC as universal apps. If it's a store app and has to be verified as purchased to be installed, it's going to cut down on piracy of these games by quite a bit. Something I would love to see.