Blu Ray and DVD's won't play/play properly.

[quote user="FullHornet"]It makes absolutely no sense why an Xbox One would play DVDs and Blu-Ray's and not play HD DVDs.[/quote]HD DVD and Blu-ray are formatted differently on the disc. Blu-ray players cannot read HD DVDs and vice versa. The exception being
multi-format drives designed to read both (I have two).



Beyond the physical inability to read an HD DVD in a Blu-ray drive, there's the issue of software. HDi Interactive Format was the standard used to create HD DVD menus and other content on-disc outside of the actual movie files. Blu-ray uses scripts and Java.
Unless playback software can understand HDi Interactive Format, HD DVD menus won't work and the disc won't play.



If it was possible for Blu-ray players to play HD DVD, people wouldn't be holding onto HD DVD drives.

Well it won't play 3D blu-ray. If any other blu-ray, DVD, game disc work fine, the issue is with the thor regular version.

No Blu-Ray is a different disc reading to the standard DVD basis. Many companys have the legal right of using it like Sony. But Microsoft isn't one of them so I'm sorry it won't play Blu-Ray DVDs. They require a Blu-Ray Disc Driver.

Changing region won't work for dvd/blu-ray discs.

It is region locked so will only play discs from the region you are in,for example if you are in Europe then your console will only play PAL region dvd's/blu-rays or region free discs.

No I would expect a blu ray player to play DVDs as good as a standalone DVD player. Blu Ray players don't magically improve DVDs. The problem would appear to be that the One blu Ray player doesn't perform well when playing DVDs in comparison to other
Blu Ray players.