I came here to say this, but you ninja'd me. To repeat what you're saying, the title is wrong on two counts:

1) The research is not about the origin of life, it's about the origin of (one type of) cell structure. (Whether other eukaryote structure originated in the same way as chloroplasts did is unknown, although probably true.)

2) The research is about something that happened during the Mesozoic, not the original origin of chloroplasts back in the Pre-Cambrian. Whether the two events happened the same way is unclear (although plausibly true).