That Lenovo tablet with HDMI input is official, and it's a monster media machine
Amazon.com: KIWIHOME Switch Dock Charger Adapter for Switch OLED, 3 in 1 Switch Charger for TV, Switch TV Dock with USB 3.0 Port, Covert Dock Switch for Android Smartphone Tablet, 1.2M Power
Toshiba Thrive Tablet Review - Walt Mossberg - Personal Technology - AllThingsD
Tripp Lite 6in Mini DisplayPort to VGA / DVI / HDMI Adapter Converter 4Kx 2K 6" - Mini DisplayPort/VGA/DVI/HDMI for Audio/Video Device, Monitor, Tablet, Projector, TV - 1 x Mini DisplayPort Male
Tablet With Hdmi Output
Amazon.com: HUION CB01 3in1 HDMI Cable for Graphics Drawing Tablet Kamvas Pro 16 Pro 13 Pro 12 : Electronics
XP-PEN SPE40 USB Type-C 3 in 1 Cable with HDMI port for XP-PEN Artist1 – JG Superstore
Lenovo's Android Tablet Story: Netflix, Storage and a Pen | TIME.com
Amazon.com: CY Micro HDMI Left Angled 90 Degree to HDMI Male HDTV Cable for Cell Phone & Tablet & Camera (1.5M, Left Angled) : Electronics
Magic Keyboard Case For Ipad Pro 11 12.9 2021 2020 Air 4 10.9 Tablet With Protective Cover Pencil Holder 4k Hdmi Port Usb-c Hub - Tablets & E-books Case - AliExpress