Movies are more accessible and reach a bigger and more diverse audience, IMO. You pay one ticket and go watch it with your friends, kids or significant other (or alone) and it's over. You like it, can buy the DVD and watch it at home again. It's a complete, self-contained experience that I wouldn't say it's now 'outdated' or replaced by TV or streaming services. There is something magic about watching movies at the cinema too that I wouldn't want to lose, it cannot get replaced no matter how big or technologic your home theater is.
I don't see why trek should be out of that and become a niche thing only available to a selected audience.
Those who watch current TV trek may forget it or not realize it, but probably most of the audience of the movies doesn't even watch Discovery&co. It doesn't exist for them.
It's bittersweet for me that current TV trek essentially is only something that younger audiences can watch if their parents can afford to pay for a streaming service or are willing to. Don't make the mistake of assuming this is a given and most of the people get access to these things.
Streaming TV is improving and becoming popular and accessible, but I'd be careful believing it has really became the default and main way to release content to the public.
If streaming TV was truly 'enough' you wouldn't still have movies that make billions in few weeks. Disney and marvel wouldn't bother still making movies released the 'old fashioned way'.