Transition from glossy to matte UI elements

Something I noticed as a general trend with modern technology (especially in mobile development) is a trend away from shiny, glossy UI elements like icons and buttons to a more flat, conservative style.

Here’s a really interesting discussion I found about the subject on the UX stackexchange site http://ux.stackexchange.com/questions/35576/what-explains-the-current-shift-from-glossy-uis-to-matte-uis

OwnerDrawing a TreeNode in .NET

I’ve used the TreeView control in .NET extensively, but one thing I always wanted to be able to do is have “sub titles” on the tree nodes. Eclipse uses them extensively on their Package Explorer