Where will my start screen go with update to WIndows 10?

[Windows Central Question]

What will happen to my start screen tiles with the Windows 10 update? I have lots of things on my start screen, such as internet links to things I want to follow up on, etc. I do not want to lose these, nor do I want to lose my start screen arrangement. I'm not thrilled about vertical scrolling, since it's hard to scan group titles that way, but I'll deal with it (or change how I do things I fear, since scrolling tiles horizontally works well for me).