The Logitech MX Mechanical and MX Mechanical Mini are now official. Both keyboards can be configured with Blue/Brown/Red switches with a travel distance of 19 mm and can offer up to fifteen days of battery backup. The MX Mechanical Mini costs €159 and the MX Mechanical €179.
https://www.notebookcheck.net/Logitech-MX-Mechanical-and-MX-Mechanical-Mini-announced-with-multiple-switch-options-Bluetooth-LE-compatibility-and-more.621750.0.html
What a disappointment that the F keys are grouped only visually, or so it looks to me. It might come as a surprise, but some people use keyboards without looking at them, relying on tactile clues like gaps between keys. And all that just so that they can add two useless function keys.
I actually like RGB as I dislike white backlight. RGB means that I can get what I want which is soft orange. It allows me to see everything perfectly if I need to take a look and is never obtrusive, never calling attention to itself when I'm looking at a screen.
What people really want is a TKL version of these keyboards, not mini which has same disadvantages as a centered laptop keyboard. When you can't take the full MX with you, a TKL is still acceptable to fit in most bags while providing better functionality that a mini.
I actually prefere 75% layout. TKL is a bit bulky to carry it every day to work, while 75% is just right - small footprint while still having all keys there. I would also like to have a small separation between F4/F5 and F8/F9 and hope they will come with 2.4Gz connection - the only wireless option in companies where bluetooth is disabled on laptops.
It's more important to have separation for the arrows block or at least make them like the non mechanical MX mini - full left and right, half size up and down. This type of arrow layout it's a disaster for me. I can't use it. Not than I would need a mechanical keyboard, when I already have scissor MX full and Mini :)