I found this project AWtrix which is a poormens “LaMetric”. It is very cool and consists of a server which “renders” the display data und an controller (ESP8266) which displays the data on a 8x32 matrix.
This is a germany video about AWtrix https://www.youtube.com/watch?v=7MknC1Ib7Qk
When FASTLED with matrix support is incorporated in esphomelib one can get rid of the AWtrix-server and push the information directly from home-assistant to the display.
I would enjoy it!!