I’m not sure that I see a real need for landline phones, now that a big slice of the world relies on mobiles.
The manufacturers used to make a huge benefit out of the ability to rove around your house and garden using a DECT cordless handset. The trouble with this idea is that people now leave the handsets down wherever they have concluded a call. Just use the ‘handset locate function’? Oh please…when I have to make a call, the last thing I need is to have to listen for a handful of handsets beeping in the domestic distance.
Today’s invention is a landline handset which can tell (using an internal accelerometer) immediately it has been set down on a stable surface and it sets off an alarm until it is replaced in its holster/base unit.