The NRAO and the ngVLA project will convene a Splinter Session titled "The Highest Angular Resolution Frontier" on 7 January 2026 at the 247th meeting of the American Astronomical Society, in Phoenix, Arizona, USA. This session will highlight recent science breakthroughs enabled with milli- and micro-arcsecond angular resolutions. It will also discuss future science possibilities that demand joint improvements in angular resolution and sensitivity. Invited oral presentations will cover Neutrino-Emitting Blazars (Matthias Kadler, Julius-Maximilians-Universität Würzburg) , Resolving Compact Binary Ejecta (awaiting confirmation), Peering into the Formation of New Worlds with the ngVLA (Luca Ricci, California State University), Multimessenger Astronomy with the Celestial Reference Frame (Sarah Burke-Spolaor, West Virginia University), and ngVLA Status and Update (Eric Murphy, NRAO). To broaden information sharing, the presentations will eventually be posted and advertised world wide. [Image credit: Science Communication Labs]