The new PubMed is under active development on the PubMed Labs platform, https://www.ncbi.nlm.nih.gov/labs/pubmed. Users are encouraged to try PubMed Labs for the newest features and improved mobile experience. The appearance and layout will change as features are added, tested, and refined; however, you can get a good idea of how the new PubMed will look and function by trying out PubMed Labs. Feedback is welcome and may be submitted using the feedback button available on each page of PubMed Labs.
NLM anticipates announcing the new PubMed in September 2019 and beginning next year, users will be directed to the new PubMed by default. NLM will continue to run the old system in parallel for a period of time after the new site is launched. If the launch date is extended, NLM will also extend the time that the legacy system is available so that users will have access to both systems for several months.
Watch the NLM Technical Bulletin for future updates and announcements, https://www.nlm.nih.gov/pubs/techbull!