Earlier this month, T-Mobile Galaxy S8s received an update that reportedly enabled Daydream, but Daydream was (and still is) incompatible. T-Mobile later updated its changelog to reflect this. However, Verizon hasn’t learned from Team Magenta’s mistake and is reporting Daydream support in their new update’s changelog as well. But things you do get include an updated navigation bar (for better or for worse), as well as the ability to send GIFs during phone calls.
Verizon Galaxy S8 and S8+ updated with new navigation bar features and Daydream support (but not really) was written by the awesome team at Android Police.