So basically, PSP game cases are a contender for my all time favorites. Sleek, classy, and some publishers uniquely took advantage of the translucent plastic to include box art visible only from the interior. My personal favorite, the Dracula X Chronicles (thanks to the androgyne!):
First, a side by side comparison with both cases:
So, thinner and shorter but clearly inspired. Now the real interesting part is what they look like on the inside; I personally believe the translucent PSP cases were not initially meant to be used this way and it was just something that innovative publishers started to do. Many (probably most) PSP covers were just blank white on the inside, even first party Sony games. With the Switch cases, however, the plastic is more transparent to better view the art and it seems that every single game will take advantage of this. Behold:
These might just be the most beautiful game cases ever designed.