Apart from announcements in newsletter (they are announced in Announcements part of this forum) there's discussion about news shown at MWC 2026 in this topic: https://forum.mikrotik.com/t/new-mikrotik-hardware-showed-in-mwc-2026/268913
Other than that, RB5009 is currently top of SoHo line regarding routing performance. Better than that are only certain models from "pro" line (CCR2xxx and, in some particular use cases, certain CRS models ... but be careful with CRS devices, they are good for HW offloaded routing/firewalling, not for anything else .. and not every device in equal measure).