I agree. VR is for immersion into the movie and not watching in 2D form.Watching a 2D movie in VR isn't really what VR is designed to excel at right now given its current resolution limitations. It's like using a wrench as a hammer... it sort of works, but isn't the best tool for the job. A big screen 4k TV is going to work a heck of a lot better.
While watching potato cam quality 2D movies within VR is certainly possible, you aren't really benefiting from VR's "immersion" or its true capabilities that can enhance a viewing experience - it's simply simulating that you are in a large room or theater watching a screen... but the picture presented simply will be sub-par in resolution compared to a good 4k TV.
Where VR currently excels when it comes to immersion is within games or VR apps that use all of the available VR resolution space. A displayed movie image within VR just uses a portion of that space. We'll need at least another couple of generations of VR advancement (~4 years) to get the tech to levels where a displayed movie image within VR has the needed resolution to really look good and not look like a potato cam. 2D movies in VR now pretty much look like watching an old VCR player.