There are sw solutions like spacedesk (windows Tab.)or iDisplay (Android) or Touchdisplaylink (ios) jm to use a display via wifi. Otherwise you have to look for a tablet with microHDMI / HDMI INPUT.
Hello. How do you come up with an HDMI port ? ☺ The tablet only has a MicroSD port for memory cards up to 200MB, MicroUSB for charging and a 3.5mm jack for headphones....