Looks like it's improved even further - I'm seeing that model listed with 512x384 resolution, and it's $300 on Amazon.
Pretty incredible! I felt like I was getting an amazing deal when I paid about $1000 15 years ago for a FLIR E4 that I could flash into an E8. I might finally retire that in favour of one of these.
I would be amused if the actual reason for upscaling is that a 256x192 display is hard to source and that the firmware is partially shared between models with a display and models without one.