Using an alcohol-based cleaner is the best way to get all of the bacteria, but it can strip off the oleophobic (oil resistant) coating found on many touchscreen devices.
We're told to expect an oleophobic Gorilla Glass screen with a standard XGA (1024 x 768) resolution, options for 16GB, 32GB or 64GB of storage, optional WWAN, an accelerometer, gyroscope, light sensor, microphone and a battery that'll last for around eight hours in ideal circumstances.