Same here... Smartglass won't run on Nokia Lumia 929.. Starts and goes to loading then resuming and back to home screen..
Runs on my Surface Pro 3 and I swore it was working on my phone this morning.. Not sure if it was something related to OneGuide but its broken now.
Tried uninstalling and reinstalling. Reset phone..
Even tried the smartglass beta which also crashes leading me to believe this may be a backend cloud issue.
Regardless I'm glad I found this post as I almost went out and bought an iPhone today.