What PC tablets lack in appeal, they more than make up in affordability, hardware and added features you won't find in iPad. Powered by NVIDIA Tegra 2 Dual-Core 1GHz processor the Lenovo Thinkpad Tablet ($500 and up) features Android 3.1 OS, 10.1 WXGA IPS panel under scratch-resistant Corning Gorilla Glass, multitouch display with digitizer input and optional pen, 64GB built-in storage, SD slot, mini HDMI output for HD display, USB/micro-USB ports and Bluetooth, Wi-Fi and 3G connectivity. Just the right specs to future-proof the Thinkpad Tablet from becoming an expensive paperweight.