Made by Hyperkin who we all know from the Retron 5. Assuming it won't run flash carts, as the R5 didn't. Because of this, I personally won't be in the market. I do like the price point, design, & ability to run in 4:3.
Edit: We'll holy smokes, looks like the N8 flash cart might work afterall. 3 different questions were asked about this on Amazon Q&As, and all were told yes by someone listed as "manufacturer." If that is true, I'll happily fork up $40.
Amazon:
https://www.amazon.com/gp/aw/d/B072PC59 ... ref=plSrch
The RetroN HD offers:
HD audio and video (720p) with 16:9/4:3 switch (HD cable only)
High compatibility for NTSC AND PAL cartridges (via bottom case switch)
Premium classic-style "Cadet" controller (10 ft. cable)
3 ft. HD cable
6 ft. Micro USB charge cable with USB AC Adapter
Also includes AV ports with AV cable