I would love to see a small pod that could be placed under the mattress for tracking sleep. Ideally it would have two USB-C ports for applying power and/or daisy chaining to another unit (two sides of the same mattress, bunk beds, etc). Ports would be 90 deg from one another so if the sensor had to be a long rectangle then a port could be on both the short and long sides. Metrics would be similar to others including: REM, Light, Deep, respiration rate, and heart rate. Include both 1.5M and 3M USB-C to C cables only to save on cost of including a power brick.