The audio subsystems have been substantially debugged and improved, and now offer substantial emulation of the OSS audio interface, thus providing the ability to cleanly run emulated Linux and FreeBSD versions of sound intensive programs. It supports command line editing, tab completion, status bars, automatic download of URLs specified on the command line, firewall support and many other features. Old config has been laid to rest. The ARP subsystem and API has been rewritten to make it less ethernet-centric. Many kernel interface manual pages have been added to manual section 9.
Several ports support much more hardware.
Many updates to bring NetBSD closer to standards compliance. Most third party packages have been updated to the latest stable release. As has been noted, there have also been innumerable bug fixes. Kernel interfaces have continued to be refined, and more subsystems and device drivers are shared among the different ports. You can look for this trend to continue.