SanDisk is one of the companies that will be producing CFExpress memory cards and today they released the CFExpress Extreme Pro with a new reader.

The video description talks about high-speed RAW 4k recording:

Take advantage of low-latency, high-speed RAW 4K recording that’s available with the SanDisk Extreme Pro® CFexpress® card. Backward compatible with select XQD® cameras, you’ll get a smooth, sustainable performance you haven’t experienced before.

Additional information:

• Speeds that Surpass other cards high-speed, consistent recording and enhanced workflow efficiency far beyond existing SanDisk cards are the result of read speeds of up to 1700MB/s and 1400MB/s write speeds
• Smooth 4K video performance The CFExpress form factor captures raw 4K video with sustainable, low-latency performance in your video recording
• Xqd compatibility The card is backwards-compatible with select XQD cameras that Adopt firmware enabling Express, the express Card type B Bridges existing devices with the future of technology
• Easy file Recovery with RescuePRO Deluxe software the card comes with a RescuePRO Deluxe data recovery software download offer. This software makes it easy to recover files that have been accidently deleted (download required.)
• Trust SanDisk is the worldwide Brand creative professionals and hobbyists know and rely on for their valued content

There is also a new Sandisk USB 3.1 Extreme Pro CF Express card reader.
Additional information:

• Item number 781148
• Supports USB 3.1 Gen2 speeds
• Compatible with the CFexpress Card Type B
• USB Type-C connectivity
• Price € 80,00
• USB 3.1 Gen2 permits interface speeds of up to 1250MB/s. Actual performance may vary based on memory card, host device, file attributes, usage conditions and other factors.