Well Windows Phone users are very eagerly waiting for its next update with build 10070, which is the Windows 10 for phones update to be coming to its devices soon. Well, the recently leaked image for the handset shows up the Live Tiles packed up nicely within the screen size. These screenshots have emerged from the Samsung ATIV S which shows Tiles with standard size separated by narrow borders.
However, this might be scaling issue as the platform is still under development. With a screen size that of the ATIV S, the smaller tiles would nicely fit in places allowing the larger tiles to utilize the space in a better way for the final product.
As for build 10070, it is said to be quite buggy, not to be unexpected given the Insider program. It is great to work with the program and provide feedback, but Windows 10 is not ideal as a daily driver.
The overall look shows that as compared to the Windows 8, the upcoming OS makes better space utilization of the screen and would look great on device such as the Lumia 1520.