I wouldn't say going from 1080p to a 1440p camera is a dramatic step up, but once i tried one of the many cameras that use the 1440p IMX 335 sensor i quite liked it, even if my PC screen are only 1080p.
Only drawback i have found is my editing software ( powerdirector 17 ) cant handle the native footage in 1440p, but it can easy work with it, just 1440p dont seem to exist, so you have to downscale to 1080p or as i do upscale to 4K as youtube seem to go a little more easy on 4K footage.
So far i am 3 dashcams in to the 1440p resolution ( one SG and two viofo ), and i am getting my first 4K camera in a few months, though here it is a new brand