ATIV S user here, but I've tried Glance on my brother's 920. Glance isn't being fully utilized unless it is on AMOLED. In that case, the 1020 & 925 are the only true Glance Screen devices. Isn't glance on LCD a bad idea? Illuminating the entire display (even if on low brightness) just to show the time and simple notification icons. Not a good idea for battery life on a LCD display. With AMOLED, there is a risk of burn-in, but I believe that Glance moves the clock around in order to avoid that.
Glance + AMOLED = they were made for each other.
Glance + LCD = why bother?
As long as all the new low-mid range 8.1 devices are LCD, I don't think that we are missing much without Glance.
Despite any trouble between MS and Samsung, I hope that all future flagships will use Samsung AMOLED. Put an ATIV S next to a 920, and you'll never want LCD ever again (except for better sunlight readability,
).