ThinkPad Tablet, but hate staring at its somewhat outdated operating system? Great news! Your stylus-friendly slate will be getting a heaping helping of Ice Cream Sandwich come spring, according to Lenovo. As part of the company's commitment to "future proofing" its devices, the update will begin hitting the tablet over-the-air in May. The Android upgrade will bring with it browser enhancements, voice input, face unlock and general frozen deliciousness.