For all the billions of dollars being spent and collected online, the code at the core of e-commerce remains highly fragmented--and that creates communication breakdowns within the overall system.
The three different sizes of live tiles on the start screen is the obvious change, but there are more subtle changes inside the core applications and in the underlying code that developers work with.
The initial install code would need to be verified for authenticity and the only way to accomplish that is to have the core developer sign the code personally or have a neutral third-party like the Bitcoin Foundation sign downloadable code with their certificate as a registered developer.
It stands in contrast to the closed or proprietary systems of Microsoft and Apple who restrict access to the core or source code for their operating systems.
Ubuntu is based on the Linux operating system and its development and use is governed by an open ethic that emphasises the sharing of core computer code.
The platform depends on a custom, minimalist core that refuses to run any software that isn't baked in and has no code outside of its main purposes: there'll be no water supply shutdowns after the night watch plays Solitaire from an infected drive.