We happy few in the PC Gamer hardware team are big fans of Logitech's MX Master ergonomic mouse, with its fantastic main wheel and secondary thumb one. So, when a handful of images for the next iteration of the long-running series popped up in an official database, we were genuinely excited to see the changes.
The database in question is that of the European Union Intellectual Property Office (EUIPO), and the entry for the Logitech MX Master 4 was spotted by Sweclockers. There are no details about size or weight, just four product shots. And at first glance, it looks very similar to the MX Master 3S.
We'd like to see the [[link]] main buttons have a little more feedback to them, too. The 3S's quiet switches are nice, though they could do with a teeny bit more of a click to them. I don't mind them at all, and what I really want to see is a better choice of material for the chassis. The MX Master 3S gets grubby far too quickly, and after a year or so of use, it always feels a bit 'dead flesh' like.
We all agreed that there are two things Logitech must not change under any circumstances whatsoever are the two mouse wheels. The main one, between the left and right mouse buttons, is perhaps the finest creation ever to grace a mouse. Its level of feedback and flexibility is second to none. Okay, I lied—there is one thing we'd like to see changed, and that's more customisation options for the wheels.
Anyway, whatever the Logitech MX Master 4 is actually like, we won't know until we get our sticky mitts on it. But when a review sample comes are way, I can guarantee there will be one almighty clamour as to who gets to test it. Naturally, it should be me because I'm the oldest one here and deserve the best of everything.

1. Best wireless:
Razer DeathAdder V3 HyperSpeed
2. Best wired:
Logitech G502 X
3. Best budget wireless:
Logitech G305 Lightspeed
4. Best budget wired:
Logitech G203 Lightsync
5. Best lightweight:
Turtle Beach Burst II Air
6. Best MMO:
Razer Naga Pro
7. Best compact:
Razer Cobra Pro
8. Best ambidextrous:
Logitech G Pro
9. Best ergonomic:
Keychron M5

