Up until recently there were not too many size options in Windows tablet market. You could either choose a mini 7-inch slate or a big 10-inch one. Apparently, there was something missing in the middle and the void is starting to fill up quickly with 8-tish-inch devices. On Monday at Consumer Electronic Show another one was announced, the Lenovo ThinkPad 8. The tablet will hit the stores later this month and will be available in several storage and connectivity configurations starting at $399.