Fujifilm's GFX-50S is a high-end medium-format digital mirror-less camera, that sports a 51.4mp sensor (43.8x32.9 mm), Fujifilm's latest X-Processor Pro and a new GF lens mount. The GFX-50S has a 3.2" tilting LCD and a 1280x960 OLED microdisplay based EVF (probably MicroOLED's MDP-02). On the top of the camera there is an E Ink display that shows the camera settings and status in highly readable way.
This page lists all digital cameras with OLED displays. OLED are used as screens mostly in compact cameras, but the technology is also starting to appear in DSLRs and high-end models.
Panasonic's Lumix DMC-FZ2500 (and the similar FZ2000) uses a 1"-type 20MP sensor, 24-480mm F2.8-4.5 lens, 4K Video-support, Wi-Fi and an XGA OLED EVF with a magnification of 0.74x.
The FZ2500 will ship in November for $1,199.
Panasonic's Lumix DMC-G85 (G80 in some regions) is a mirrorless camera that sports a 16MP sensor, weather/dust proofing, 4K video support, Wi-Fi and an XGA OLED EVF with a high magnification ratio (35mm camera equivalent).
The G85 will launch in the US for $899 (body-only).
Sony's HX80 is a compact zoom camera that features a 18.2MP sensor, 30X optical zoom, FHD videos, Wi-Fi, NFC, tilting LCD display and a retractable OLED EVF.
The HX80 will ship in April 2016 for $350.
Nikon'a DL24-500 is a SLR-like high-end camera that sports a 20.8MP 1"-type sensor, 24-500mm equivalent F2.8-5.6 zoom lens, 4K video at 30p, HDMI output, Wi-Fi, NFC and bluetooth and a 3" fully articulating OLED touch display and an XGA OLED EVF.
The DL24-500 will ship in the summer of 2016.
The DL18-50 is an enthusiast compact digital camera that sports a 24.8MP 1"-type sensor, fast 18-50mm equivalent F1.8-2.8 zoom lens, 4K video at 30p, Wi-Fi, NFC and a tilting 3-inch AMOLED display.
The DL18-50 will ship in the summer of 2016 for $799.99.
The DL24-85 is an enthusiast compact digital camera that sports a 24.8MP 1"-type sensor, fast 24-85mm equivalent F1.8-2.8 zoom lens, 4K video at 30p, Wi-Fi, NFC and a tilting 3-inch AMOLED display.
The DL24-85 will ship in the summer of 2016 for $649.95.
Sony's A6300 is a mirrorless camera that boasts the world's fastest autofocus in its class, continuous shooting at 11fps and 4K movie support. The A6300 features a 24.2mp APS-C sensor, a 3" LCD and an XGA OLED viewfinder.
The A6300 will ship in March for $1,000 (body-only).