The mountable gadget I'd like to see

[Gone in 60]

... Samsung Galaxy Series phones work fine, especially when the RAM X-Grip is used.

Sensor clusters makes sense and exist - yes.

Can confirm. At my last job, we sent vehicle sensor data via Bluetooth to phone displays for testing. On motorcycles and go-karts, Iphones in direct sunlight were unreadable and overheated to shut-down point fairly quickly. Our $99 Samsungs, however, were more easily visible and never shut down on us.