The smart 68 would be perfect if it didn't use 1.5, 1.25, 1.5, 6.25, 1.25, 1.25, 1, 1, 1 on the bottom row. If the left ctrl and alt keys (which are 1.5x in the concept model) were 1.25x, and the right ctrl and alt keys (which are 1.25 in the concept model) were 1x, then not only would the spacebar and modifiers be in a more familiar position, but there'd be space on the right for one more 1x modifier, which could be mapped to super or menu.
Here's a picture illustrating what I'm talking about:
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Notice the bottom row is 1.25, 1.25, 1.25, 6.25, 1, 1, 1, 1, 1, 1.
TlokiThe fn key on the Smart 68 is on the side of the case, at about the position of the spacebar. It uses a microswitch commonly found in mouse buttons.
Here's a picture illustrating what I'm talking about: