All those Samsung and LG fans who can't live with an ugly notched display might have a reason to celebrate once the next generation flagships come out. The reason is that these two brands are supposedly ready to use "sound-emitting displays" that eliminate the need for a front-facing earpiece.
https://www.notebookcheck.net/Kill-the-notch-The-Samsung-Galaxy-S10-and-the-LG-G8-rumored-to-be-notch-free.308674.0.html
Using the front glass to omit sound is nothing new, it has been on devices since as early as 2014 (Sharp Aquos Crystal). The pop-up selfie camera on the Vivo device is impractical, ugly, and begs for issues. You need space for ambient lighting sensor, for proximity sensor, not to mention LED notifications light.
I would drop the front camera and place all sensors on a side. After all, there are a lot of people who never take selfies..
Vivo bragged 98% screen to body here and as anybody could see that's not the case, I don't know if their PE teacher taught them math or something but this is only marginally better than the MIX2S, nothing groundbreaking.