The ESP32 does everything a Pi Pico does, but costs less and lasts 100x longer on batteries ...
The Sentinel Core board measures 170 x 170mm (6.7″ x 6.7″) and should fit into most computer cases designed for mini ITX boards. It has the dual 100-pin connector used to attach a Raspberry Pi CM5, ...
The Pi Picos are tiny but capable, once you get used to their differences.
But if you want something a little more versatile, you may want to consider plugging a full-fledged computer into your TV.