Unfortunately even the Kobo is still glass substrate, despite their advertizing.
https://www.mobileread.com/forums/sho...2&postcount=15
They're probably saving the no glass for the next reader generation to be released in 2 years from now.
Apparently the technology makes so little advancement that they have to spread it out over time to create the illusion of progress. :P
Until then you'll simply have to be very careful with your devices.