I think this feature is still relevant. The goal here would be to reproduce what the gaming industry does. This means holding the mouse for free look + rotation and WASD to move visitor foward/back/strafe left/strafe right. Holding Alt while moving mouse + arrows is next to impossible. Most of users nowadays have the muscle memory of gaming, so it would mean a smaller learning curve for everybody. It could be an option in the settings to toggle the "gaming" mode for 3D view! Cheers!