I was initially very excited about this device until I read that any app can be downloaded from the Play Store. I doubt my willpower is strong enough to stop me from eventually downloading a browser, Reddit, Instagram, etc... Therefore, to me, this phone is really no different than the iPhone that I already own.
What I'd prefer is a device with no ability to download social apps, a browser, games or even news apps (when did 24/7 access to the news become a necessity?). A device like this is bold but, if it caught on, could change society in a positive way. No more endless checking of social media, the news etc. while on the go or in the company of friends/family. It could strengthen the connections that we have with others.