Store (Beta) has dropped its beta tag and has been promoted to number one. And with that it's goodbye to the old Windows Phone Store.
The new Store has been around throughout the preview process but for much of that time it has been a pretty buggy experience. On my own test device, I'm still experiencing a ton of issues every time I open it (the joys of testing things!) But, it has been getting better, and now it's front and center hopefully any remaining issues will begin to get ironed out quite quickly.
So, if you're updating to 10166, there's only one place to get your apps. Let us know how it's working for you.