Aaron reviews AT&T's Motorola Atrix HD, Motorola's first device to ship with Ice Cream Sandwich.  Available for $99.99 and packing 4G LTE connectivity, Atrix HD sports a 1.5 GHz dual-core Snapdragon S4 CPU, 4.5-inch HD (720p) display, 8-megapixel camera with 1080p HD video recording, a 1,780 mAh battery, and Android 4.0 with Motorola's UI - which is becoming more and more like stock Android every day.  It's the first smartphone since the Samsung Galaxy Nexus to sport on-screen buttons.  Is it worth spending $100 on, or should you spring for the HTC One X or Samsung Galaxy S III?  Part 2 of 2.