Microsoft’s take on ergonomics is that a keyboard should have subtle curves and plenty of padding. We actually dig it, but making the spacebar twice as wide as the other keys, splitting it two, and assigning the left side backspace functionality is a bridge too far. Fortunately, you can easily render the left spacebar a normal spacebar again.
There are dedicated Windows 8 shortcut keys for opening the Search, Share, Devices, and Settings charms, and Undo, Cut, Copy, New, and Open are printed on the Z, X, C, N, and O keys, respectively (in case your muscles haven’t memorized those Ctrl-plus combos). This keyboard doesn’t have a fancy backlight, but it’s priced right at $60.
Microsoft's website has more details.