[Jan Tomsic]

Can a 3rd party app change the new Start background? Like how an app can take control of the lock screen in WP8?

[afnan_mc]

How do you mean.? Change background images periodically.?
No word on that being present in the 8.1 update.
A good thing too imo, because it only takes a minute of thought to know its a bad idea. Makes it hard to get used to the home screen and not sure how random images are going to help since I know I'll be carefully picking mine. But, not to say you won't like it. Probably add it later but its not there yet as far as I know.

[Jan Tomsic]

How do you mean.? Change background images periodically.?
No word on that being present in the 8.1 update.
A good thing too imo, because it only takes a minute of thought to know its a bad idea. Makes it hard to get used to the home screen and not sure how random images are going to help since I know I'll be carefully picking mine. But, not to say you won't like it. Probably add it later but its not there yet as far as I know.

Random, preset, images, colors, you name it, anything is possible with an API, I didn't have a slideshow in mind, just a color picker to easily change the tile colors (so you're not limited to stock colors and images only)