Version 6 of SmartTiles (under development) is using material design where possible, though initial release will focus on the current tile grid view its users love.
The underlying engine will be able to serve different presentation layers. First we add themes and skinning, and then,… Well, the design above is likely possible. Heck, we should bring @samwang to the project!
but… There’s no API from SmartThings for configuration commands (add Devices, display their sub-tiles, install and configure SmartApps…), so nobody can actually replace the SmartThings App. SmartTiles aims to handle the daily routine monitoring and basic controls. The stuff people do most often, unless they are super automated.