Many times, when I am driving my car, I worry about the tyre pressures. Why can't I have a gauge or friendly light to tell me they're ok? In my head, I have designed many different systems for the measurement and the telemetry. I realise it isn't 'very easy' but there's no reason it can't be done. Why isn't it marketed to people as another 'peace of mind' gizmo? It's far less smart than automatic parallel parking!