So here’s the thing about Blu-ray's: they look really really good but not everything looks just as good on Blu-ray as it would say on a 35mm print. Though Cyrus was filmed digitally the conversion for the home entertainment release of the film doesn’t necessarily leave you spellbound but rather begs you to ask “why?”
The picture looks decent enough but Cyrus isn't a "visual" movie to begin with. The story and characters sound great and the awkwardness is just as awkward in 1080p but it's nothing special. All the extras aren’t upgraded so if you’re buying it specifically for the higher quality picture you would be well enough to buy a regular DVD and save yourself a few bucks.
The extras themselves are spare (but the movie itself feels kinda light so it could all be intentional). My problems with Cyrus are apparent in the extras as well. The film does all it can to highlight John C. Reilly and Jonah Hill (deservedly so they are wonderful here) but what holds it back from being exceptional is Marissa Tomei’s character. Not Tomei herself; she's great but isn't given anything special to work with. All she does is dote on Reilly and Hill. Whatever weight her character could have been given is completely lost. Why? Perhaps it could be that her improvisation skills aren’t as up to speed as Hill and Reilly’s (in one featurette the directors - the Duplass Brothers - admit that most everything was improvised off a fully written script). Had she been able to keep up with these two comedic powerhouses then the film would’ve been complete.
Thus the problems with the extras. They all focus on Reilly and Hill. There are two character-focused shorts that feature their characters and Tomei is nowhere to be found. There's just a single directors feature in which they talk about the movie in a single shot with their children playing around their feet that doesn’t offer anything beyond what is easily found on the internet. Hill and Reilly make an extremely awkward (and not good awkward) music beat using lines from the film but it really feels like fluff. The deleted scenes were cut for a reason and don’t really add anything extraordinary to the film. And there is nary a commentary track to be found.
The film is worth seeing (offering some of the best performances ever from Reilly and Hill) but the Blu-ray is not worth owning.