I thought to post/ask this here, since it's kinda AV related, even if not strictly to the usual hardware.
Basically, I had the chance to play with a New Nintendo 3DS XL - top screen IPS, touch screen TN - and try a few SEGA 3D Classics on it. After spending some time with 3D Galaxy Force II, I noticed the very same thing that happened on my IPS LG monitor, after using bob-deinterlaced 480i Saturn/PS2 games on it (
it's all explained here)... The very same temporary burn-in and 'after-flicker' effect, on the 3DS as well.
Specifically with Galaxy Force, the parts that caused image retention/after-flicker were those around the hud, such as the spaceship silhouette underneath 'SHIELD', which flickers constantly, during gameplay.
I just thought to drop this here and see if any of you can try and replicate the experience. Along with a couple of guys at the SHMUPS forums, I'm trying to figure out whether or not this very weird phenomenon is only due to the screen being IPS, or if there are other factors involved (PC monitors offer a plethora of options to fiddle around with, but the 3DS is pretty much a simple 'ON/OFF' kind of thing).
All that said, I played 3D Galaxy Force II for around 10 minutes - the game was set to easy, and I beat 3/4 stages, before quitting - with default screen settings, on a European New Nintendo 3DS XL with an IPS top screen and the 3D slider cranked up to the max.