I'm all for the OLED display, it's the one thing I miss on the V20 from my previous Samsung phones, however, I really hope it's not curved. I had a curved screen on my ill-fated Galaxy Note 7 and I couldn't stand the way it distorted the top and bottom of full-screen videos and photos in the landscape mode. Also, the way that case manufacturers have to design cases for curved-screen phones, it leaves the edge of the screen susceptible to taking a direct hit and cracking. I've resigned myself to the fact that the V30 will probably lose the replaceable battery but I really don't want to see LG go down the curved display path.
http://phandroid.com/2017/04/19/lg-v30-curved-display-rumors/
http://phandroid.com/2017/04/19/lg-v30-curved-display-rumors/