The Intel Graphics Installer for Linux is an attempt by Intel OTC developers to make it easier to upgrade their open-source driver on Fedora and Ubuntu. In particular, the installer is designed for Ubuntu 13.10 and Fedora 19.
The problem with the open-source graphics drivers -- just not Intel, but all of them -- are that the "driver" is spread across the stack with components found in the Linux kernel, DRM library (libdrm), Mesa, the X.Org DDX, and other related projects like VA-API and then any other dependencies that get bumped in the process. It's not nearly as easy updating the open-source Linux GPU drivers as it is the closed-source AMD/NVIDIA drivers on Linux or Windows where they are more self-contained.
The Intel Graphics Driver Installer is basically a repository maintained by Intel with these packages targeting the popular Fedora and Ubuntu releases. On Ubuntu you can already have nearly the same affect (or better) by just using the Ubuntu Mainline Kernel PPA and using the Oibaf graphics driver PPA.
Those wishing to try out the Intel Graphics Driver Installer 1.0.3 for Linux, which was released earlier this week, can visit 01.org.