Funny to see Matrox discussed mostly as a piece of PC graphics history, I actually work with Matrox cards almost every day.

In the broadcast world they're still very common. X.mio/DSX cards are widely used for professional SDI I/O, video servers and channel-in-a-box systems, and Matrox also has dedicated M264 hardware accelerators for H.264/AVC encoding and decoding.

The current flagship X.mio5 family is basically high-density professional video I/O: 12G-SDI variants for UHD workflows, plus newer 25GbE versions for SMPTE ST 2110/IP environments. Very different market from the old Millennium/G400 days, but Matrox is definitely still around