In June 2020, the ACM Council voted to transition ACM's Publications program to a 100% sustainable Open Access model within 5 years with the ultimate goal of making all ACM-published articles open access upon publication. This deadline is fast approaching, and for some ACM-published conference articles the new model is already active. ACM is revamping its publication model with its new ACM OPEN policy. ACM has discussed the potential benefits (open articles are downloaded 100-150% more and cited 70% more frequently) and the challenges of this model in depth. Instead of discussing the merits of the model, we would like to present to our community in concrete terms the impacts of this new publication model for authors: What will change when I publish in a SIGCSE-related conference from 2025 onwards when ACM transitions to a 100% Open Access publication model?