Embedded hardware isn't difficult with today's SoCs. Manufacturing is easy when using expertise centers in Asia. I expect a write-up on HN of how easy it is to create a similar product before the end of the year, which will cover everything from electronics to injection molding to manufacturing.
It's getting easier yes but it's still vastly more profitable to just build a game for one of the big consoles or PC and that won't be changing for a long time.
If this trend continues we're doomed.