My response is late but I'm gonna do it anyway.

The PS1 mini simply had to be a good collection of games that were emulated. While it did include some notable titles, it was an odd collection missing what are considered crucial titles. But more importantly, the emulation was bad, they used slower PAL version, so it wasn't even a good way to revisit these games.

I don't think people really mind the dated visuals of early 3D graphics per se. Some look better than others. However, given its emulation there is an option to increase the resolution, blur textures, etc. The PS1 mini used shitty specs though, it had even bigger frame dips than native hardware. It was just a shitty device.

I don't know if OG Xbox has great nostalgia. But if they put together a strong collection of games and it emulated well, I think people would buy it for its own merits. The X1 is already a great emulator for playing OG Xbox games, they would simply need to bring that tech to a cheaper device TV device.

The only MS game I miss is Halo. A well priced Mini Xbox that played Halo 1, I would consider a purchase. Maybe.

With sales in the mid 20millions, I just don't know. Maybe if they tossed in a lot of the best multi-plats of the generation (Though I didn't own one, I did look at many First Party offerings with envy) ... But I bought a ton of original Xbox games for the Xbox 360 and a handful for the Xbox One and they just don't do it for me. Cutting edge at the time and some still look great, especially some of the fighting, FPS, and driving games. They were still figuring out camera controls and what to do with the right analog stick well into the 6th gen. It could work if they pull it off right...but they'd have to do a lot of things right.

Hundreds MS engineers have been hammering XBoxes into small moulds for months, but they didn't manage to produce an XB Mini yet.    

Yes. But it would be pricey. An OG Xbox mini would have to have at least 250-500gb hard drive in order to get a decent list of games. The hardware would have to be quite a bit more advanced than the PS1 mini thus I can see this thing retailing for 200-250 dollars.

A good list would be:
Halo 1&2,
KOTOR 1&2
Jade Empire,
Ninja Gaiden
Dead or Alive 3
DOA Volleyball,
Forza 1,
Morrowind,
Chronicles of Riddick,
Doom 3,
Fable,
Night Fire,
Panzer Dragoon Orta,
Shenmue 2,
Half Life 2.
Baldurs Gate,
Psychonauts,
Oddworld.

The list is problematic because the Halos can be played in different remastered versions that are superior in current Consoles. However I think some of the less popular titles in a list like mine's would attract a few hardcore buys. I am all for it, the Xbox was the power House of that generation.

With that price you might as well add WiFi and allow multiplayer lol.  It'd be nice to play phantasy star online but the og servers were taken down I believe in middle of 360 era.  Yea the games are there but the power and space will make this too expensive. 

That's what I am saying. The pricing would be a huge hurdle to overcome. Most of those games are considered fairly modern, so the nostalgic factor that might drive people to buy a Nintendo 64 mini, or Saturn mini wouldn't be there, at least yet. Perhaps a decade from now, by then the costs of such hardware would be lower too I suppose.

It's not cost-effective yet.
All the mini consoles have been Gen 5 and earlier. Xbox didn't enter until the sixth gen. Even 10 games on an Xbox Mini will at least rack up an $80 price tag. Probably higher than that.
Maybe once other mini consoles have come out and maybe after Nintendo 64 Classic, an Xbox Mini might make sense. I could see them including it with a Duke as well, or having the Duke as an optional accessory.

Sega Genesis didn't sell amazing numbers but it has had many different mini consoles and even portable versions. There have also been many Genesis compilations on consoles starting with the 6th gen.

OG Xbox definitely has more than 30 games that have aged well. By the 6th gen the dual stick was mostly figured out, especially in shooters. Might be difficult to license many notable games though, it seems like Sony struggled with their device.

Well I was never too fond of the original Xbox anyway, and already own a 360 + XB One.

After the SNES (which I own), the minis I MOST want to see are - N64, Gamecube, Dreamcast, PS2 (was never huge on Sony consoles but you can't deny the robust, diverse library of the thing & it's certainly my favorite Sony console).