Yes, the best SLAM we have today based on visual inertial data (Camera+IMU) uses 500mW of power. It uses DSPs and ASICs. Also, the custom silicon team from MSFT did a great job for their SLAM and display engine, it's built on ASICs in what's called the HPU for Hololens: https://youtu.be/u0eBd2m_wEs?t=1641