Must be phasing them out silently before they introduce the LCD (slim) version. Supposed to be more comfortable but I have no issues with the OLED one plus the OLED screen offers better colors and blacks.
The remote play is actually very good. It uses the native resolution of the Vita and has very minimal lag. There are a few problems I have. First there are only two shoulder buttons on the Vita so the L2, R2, L3, R3 buttons are mapped to the rear touchpad which makes them tricky to use accurately for games that rely on them. Secondly there is a minor amount of input lag which is unavoidable when streaming games wirelessly. Some games require very twitch movement and the analog sticks are a bit sensitive and lack some precision as compared to the PS4 or PS3 controller, this makes the input lag even more difficult for some titles.