The race for bigger megapixels has started again with the new Sony R IV at 61MP.

• Unprecedented Highest Resolution and Widest Dynamic Range for α – Alpha System, Combined with High-speed Performance and a Lightweight, Compact Body 
• World’s first 35mm full-frame 61.0 MP back-illuminated Exmor R™ CMOS image sensor with latest-generation BIONZ X™ image processor
• 15-stop dynamic range at low sensitivities, resulting in smooth, natural gradations ranging from deep shadows to highlights
• High-speed continuous shooting at up to 10 fps with full AF / AE tracking for approximately seven seconds in full-frame mode with an increased buffer memory, and approximately three times as long in APS-C mode.
• 567 focal-plane phase-detection AF points covering 74% of image area and 425 contrast AF points 
• Debut of Real-time Eye AF for movie recording and advanced Real-time Tracking plus Real-time Eye AF for still image recording
• Features an APS-C crop mode delivering stunning high resolution images of 26.2MP
• 5.76 million dot UXGA (Ultra-XGA) OLED Tru-Finder™ electronic viewfinder with outstanding detail, brightness and contrast
• Upgraded connectivity and operability including high-speed Wi-Fi support, wireless PC remote connectivity, FTP wireless transfer, faster data transfer via USB and more
• Professional 4K movie recording functionality including full pixel readout with no pixel binning in Super 35mm mode, S-Log3, HDR workflow support
• Multi Interface Shoe™ with digital audio interface delivers the high-quality sound recording with Sony’s new microphone and XLR microphone adaptor 
• Additional enhancements to the body design include an improved grip and button layout for improved control with compact, lightweight body

Sadly it does not have a full size HDMI socket nor 4K 50p internal filming, benchmarks we have come to enjoy with Panasonic GH cameras.