Wakeword support in the official app was supposed to be “coming soon” for over a year. In that time multiple community driven projects have started to try to solve this problem with hacky workarounds using 3rd party software. Dedicated hardware is great except most HA users already have mobile devices and dashboards setup in their homes and don’t need yet another single-purpose piece of disposable electronics in their homes.
would love for wake word support on a wall mounted tablet as well!