Wow, haven't heard that mentioned in quite some time. (since the mid-90s)
Haha, that's because they used to be one of the few solid options in the Business world. Before having 4 monitors on a graphics card was just something you expected, you had 1 video output, maybe 2 if you were cool. In those cases, products like Dual and Triplehead2go were essential in getting multiple monitors on things like your Mobile Workstation. Nowadays, they play mostly to high end markets. They are still extremely solid options for multi-display and multi-gpu solutions that are
supported for years. Like I mentioned in my previous post, Matrox is probably the most affordable option if you're doing video over 4x3 digital signage (12 monitors with frame locking).
Their PowerDesk software continues to get better and supports most Windows and Linux distros. It properly handles monitors with different resolutions, different aspect ratios, different pivot angles, or any combination. It handles bezel size management. You can group certain displays to stretch content while leaving others independent. You can partition displays or displaygroups to create sub-displays on them. You can emulate / clone / or replace EDID on monitors (and monitor partitions) to ensure they're treated consistently by the OS even if they're not the same. Like I mentioned, there's lots of ways to get multiple high-res displays, and at the end of the day, a Matrox Card is just an old AMD FirePro Card. It's the PowerDesk and genlock features that make a matrox card one of the definitive choices for multi-display workstations.
And besides, they still have a suite of 4K and even 8K encoder and decoder systems.

They may not have the broad advertising of some of the other players, but in the Enterprise space, Matrox is still very much relevant.
My curiosity is what they plan to do now with no Polaris version of the FirePro W600 being announced. Currently, the WX series only supports 6 displays on the WX 9100 model, which is too large and unnecessary for display wall applications. Granted NVIDIA isn't bleeding edge given the NVS 810 is an old Maxwell Card, but that's still several years newer than the W600.