GeneraLight wrote:In fact, my New 3DS XL (which has an IPS Top Screen), shows the same scanlines, albeit maybe a bit sharper.
That's because you are not enabling 3D, the only way to get native resolution on the New 3DS XL is to enable 3D, if 3D is off you'll be outputting 400x240 to a 800x240 screen, giving you the result that you see and that is no different then what you would get on a New 2DS XL.
Xer Xian wrote:This also makes me realize that I should buy a decent 1080p monitor before it's too late..
I think it's a good idea, not so much if you are a PC-only gamer, but definitly if you are a console gamer, basically if you get a 4K screen, you won't be able to enjoy the current gen nor last gen consoles at native display resolution, however with a 1080p TV current gen games and most last gen games (except for a few PS3 exclusives which only display in 720p) will look as good as they can possibly look and that will also be the case for future generation games, which will look as good as they can possibly look on a 1080p screen (with anti-aliasing added by ways of supersampling).
Basically with 4k, any resolution below 4k won't look as good as 4k resolutions and above, while 1080p, any resolutions below 1080p won't look as good as 1080p and above.
The only other choice would be to get the best 4K upscaler on the market, which cost alot of money, though not sure if that still will be as good as a TV displaying at native resolution.