my.ui - design-agnostic platform

Cool thing would be to create platform based on standard on top of HTML and cordova for mobiles which allows user to select theme on some site kinda my.ui - and all platform-compatible applications (web, mobile - dropbox, facebook, spotify, twitter etc..) would use selected theme form there and render all elements, css animation, backgrounds etc.. - based on user passions

Some thoughts about how it could be in real life:

Simplicity of standard

To attract developers by ease of use.

Definition of standard menu could look something like:
<ul class="menu">
    <li><i class="folder"></i>Files</li>
    <li><i class="picture"></i>Photos</li>
    <li><i class="sign-out"></i>Sign out</li>
</ul>

This would allow to easily define and use UIs also outside of platform with usual stylesheets.
Inside of platform visual appearance of element is drawn by theme packages, which can apply from simple CSS background, font-size styles to complex JS/WebGL transformations to make look all menus like:

(picture source: http://www.patguarino.com/tru.html)

Random thoughts on what could be used:

• 3D rendering of controls 
  
• CSS3 animation on background 
  
• Advanced graphics rendering with WebGL: imagine "astronaut" who can read his facebook messages scattered there on the sky
  
• Controls: 
  
• Crazy things 
  

Popularize platform

Make just cool open-source applications for platform, make own and attract developers of existing applications which use APIs of popular services (facebook, dropbox, spotify, twitter, etc..).

Easy theme creation

To create basic theme designer shouldn't have any special skills - just specify colours, sizes, upload pictures using web panel.