Do not upgrade a 1660 Super to a 3050, I would go for a 3060 at a minimum. A 1660 Super is not bad, you might be better served by waiting to the 40 series. That being said given the GPU market last couple of years I wouldn't blame you for buying now. I don't know what the prices are like where you are but in the UK prices are basicly at or as close to their original MSRP as they are ever going to get now. So I would only wait for the 40 series not for further price cuts on the current stuff.
It's true, upgrading to 3050 from 1660 super is barely an improvement. The only solid one would be dlss.
3060 is the way to go because lower end rtx 4000 will not be out for quite sometime, we may see them only in a year from now. If that amount of time is fine for you, then you can wait for an entry-midrange 4000 card, assuming you have a capable cpu that can handle it.
4060 is going to be a 1080p beast because it should be around 3070(Ti) level of performance. You'll need at least 5600x level cpu for that task. Or you can upgrade your resoltion. The final decision is up to you.