It looks like a Toshiba design engineer ran out of time in developing the new Tecra M4, and decided to just hit the “zoom” button while looking at the M200 spec and submit that instead.
That's the new Tecra, here's the original M200:
Oh okay, if you look closely, it looks like the buttons on the screen were reversed. Still, I think this is a good example of not changing the formula when it already works so darn well.