Yes, you should just be able to use any HDMI capture card and add the capture card as a video capture source in your scene in OBS. (Some however are weird and won't accept certain inputs, so try asking the manufacturer if it will accept tablet input.)
But obviously, just make sure you have a device that fits your need for quality and isn't too expensive for your budget. ;)
(Be aware that most capture cards have a considerable delay, so be prepared to have to add a delay to things like webcams and microphones so that everything is in sinc.)