After four years of hype, Optimus shows some progress, yet the humanoid struggles to prove it's worth beyond staged demos.

Robot vacuums create detailed digital maps of your home that manufacturers often upload to cloud servers, raising privacy concerns about spatial data sharing.

The remarkable robot dog — or more accurately, its AI-powered brain — can even handle having its legs extended by wooden poles, or having wheels attached. Short of a rocket-propelled grenade coming ...