The enthusiast-focused Canon PowerShot G15 delivers excellent image quality, but lacks some features found in other top-end cameras. The G15 is the successor to the PowerShot G12 , a high-end compact camera that is now two years old. The G15 offers numerous upgradesa 12-megapixel CMOS sensor, a faster lens, and a sharper rear display among them."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips