Netflix was a streaming platform in 2007.

https://arstechnica.com/uncategorized/2007/01/8627/

By 2009, they had 12,000 movies up for streaming, and Netflix-compatible devices were advertised heavily in stores, with Best Buy including Netflix apps on their store-brand devices.

https://www.cnet.com/news/netflix-compatible-video-devices-c...

The big announcement when the iPad was introduced in March 2010 was that Netflix would have an app for it. It had been streaming for at least three or four yesss by then.

they used to have discs for many platforms (e.g. PS3, Wii) where you could install Netflix and play online content before the app was released

I was streaming from Netflix in 2007.