It's not really a problem with software/hardware scaling of graphics. Current price similiarities might sound tempting at first glance, but those monitors are simply bad, low quality screens; not worth it. Get a decent 1080/1200p monitor instead. There's a nice lineup of those out on the market right now and you can get really good screens starting from 300$. Anything below will be mediocre or trash and I'm not even talking about 1440p. That aside, when we're talking about gaming, barely any card right now can handle modern games on 1440p maxed out (and they're already talking about 4k, lol). Even the high-end cards struggle to deliver smooth performance on 1440p. You need sli/crossfire setups for smooth multimonitor/multitask gaming and anything over a single 1440p monitor; pascal gpu's won't perform well with anything above that.
Most vn's at the moment are still made in HD standards. That means 720p art, which is upscaled to fit more modern resolutions. Nedless to say, it looks bad, even on 1080p, not to mention higher resolutions. VN's look a lot better on smaller screens, preferably those that work natively with 720p resolutions. there is a rather small lineup of vn's already made in 1080p, but even those typically don't take full potential of these resolutions; the art is either rushed or budget quality, which means large areas of flat colors and little to no brush grading. In such case, results aren't any better than those of upscaled 720p vn's. Production of 1080p and UHD assets is very costly, which means we still won't propably see 1080p as the new vn standard for quite a while.
I myself bought an Asus PA238 monitor as of late. If you're interested both with art and decent gaming performance + best possible color reproduction available at that range, I'd higly recommend this one. One of the reasons is that graphics, especially static make a very important part of vn's; bright and faithful color reproduction should be of utmost importance, if you want to truly enjoy their art.