NVIDIA, a company once focused entirely on giant graphics cards for home computers, has already quite successfully re-positioned itself as a player in the mobile graphics world. Now it's poised to really shake things up, announcing the acquisition of Icera. The UK-based company you've probably never heard of has a line of on 3G and 4G baseband processors used in wireless devices and USB modems -- chips that are said to be smaller, more flexible, and more efficient than the competition from Qualcomm and