Is it worth upgradings to ATI Mobility Radeon™ HD 5470 GPU (512MB VRAM) graphics card ?

Hi I am custumozing a Sony vaio and use Slingbox on my laptop often and keep the computer plugged into a TV often with HDMI hookup. Is it worth the $50 to upgrade to the ATI Mobility Radeon™ HD 5470 GPU (512MB VRAM) from Intel® Graphics Media Accelerator HD for the Vaio? Im using an i5 processor on it with 4GB Memory and 500 GB harddrive