This morning they were released photos from one Chinese website, which show a new build of Windows 10. The Windows 10 build 10102, which is expected to be released in early May and will probably be presented at the Microsoft BUILD 2015 conference, there are several improvements to the Start menu and the Cortana service, which appear to be closer to their final format.
The Cortana service has been redesigned to match better in the new Start menu as shown in the pictures.
The overall design of the Cortana has not changed, but it seems to have a new "hamburger" menu that seems to be very practical for many, mainly because this way you can configure your personal assistant much more easily.
As you can see for yourself, Windows 10 build 10102 seems to come with the same icons (pity) as in build 10061.
The new build comes with few other minor visual improvements, which shows that the software development team has focused on better integrating Cortana into the Start menu and desktop.
What we cannot know from the photos that they leaked, are the possible performance changes and optimizations in the core.