Technical Preview build on Windows 10 for Phone currently stands at 10052 with a new build carrying touch optimized Office Apps expected shortly. While the wait for new build continues, you can refer to the changes thats present in build 10069 in the latest version of Visual Studio.
A look at build 10069 via emulator
- New Start screen where tiles are much closer to each other than ever before
- A couple of new apps
- Start screen transparency settings & new color palettes