What keyboard options will be available?

What are the specs for the keyboard envelope and interfaces?
By envelope, I mean size and dimensions.
Is the envelope for the keyboard the same for FW13 and FW16?

Based on the information released so far, the 16 keyboard seems to have an option to have a numeric keypad on the side.

Seems to have more space available.

Wait for the deep dive, or the release of the devices

Or, use it with a external keyboard if that works better for you.