Wel to be honest was quite easy, the amazing HomeyDash we off course already have ;-), I use Dakboard (https://dakboard.com/site) for my Calendar, the view you see on the TV can be created with the free version but for a couple of $/month you can created a quite good looking easy customizable dashboard that you can stream to a Google Hub with a Homey flow for instance, in my opinion Athom should have a look at this! because this is awesome! Missing only a good Sonos player here, so build a small dashboard in HA, ( https://www.home-assistant.io/getting-started/) was new to me and I’m not a developer, designer so was a bit worried for that, but to be honest the setup, configuration (click and play) was less than a hour work on a old Raspberry Pi 3 that I had laying around .
After that you just add the plugins for Sonos, Hue, Netatmo and… to HA (click and play) and some other plugins install the plugin HACS (https://hacs.xyz/) and everything is directly there, very impressed! after that I just build a small dashboard, mostly copy and paste to be honest
Put my old Raspberry Pi 2 on my desk TV, use chromium and just load the webpage’s from HomeyDash, HA and Dakboard and that’s it!
HACS plugins I used for the Sonos Dashboard
Banner card: https://github.com/nervetattoo/banner-card
Sonos alarm: https://github.com/AaronDavidSchneider/SonosAlarm
Custom header: https://github.com/maykar/custom-header
Mini player: https://github.com/kalkih/mini-media-player
Fold entity row: https://github.com/thomasloven/lovelace-fold-entity-row
Dakboard dashboard on my Google hubs;