Yes and No (Destiny)

by Beorn , <End of Failed Timeline>, Monday, January 01, 2018, 14:54 (2599 days ago) @ DEEP_NNN

Yes on the reticle thing. The inner "bloom" indicator becomes larger and gains an "overlay" blending mode while you're airborne. Once you hit ground, it goes back to normal.

Solid no on the lag thing, though.

One thing I do notice at 4K, though, is that there's a bit of cursor input lag when talking to NPCs. I think it's due to the blur effect on half the screen being applied at high-resolution. It adds a little bit of delay (<100ms) to the input, and it's only in those screens, so not a big deal.