I'm excited to see ASRock is pushing on with STX despite being alone in doing so. I hope they are able to develop it a bit further to where it can be adopted and a market for it's components is created.
It would be a big opportunity for AMD, since it appears Intel has all but abandoned it along with Thin ITX. I saw STX as a better answer for systems that don't require everything brought into the ITX platform, enabling the miniaturization we are after.
Fingers crossed they are able to pull it off.