
No, BeOS is not dead as many will speed to the forums and proclaim.
YellowTAB's Zeta is the true inheritor of BeOS 5's fortune, as it is based directly on Dano/EXP's codeline (which was supposed to be BeOS 6 but was never finished as Be sold its IP to Palm). At last, I got my hands on Zeta Beta-5a, and here is what I found and think of it so far. You might need to have some experience with BeOS in order to follow this article, but screenshots are included to make it easier for everyone.
If they are going to add something new, why not try doing something similar to Safari.
eg. KHTML stuff with an interface that is a lot like Netpositive with tabs.
Also in the future as the Mozilla team make gecko more embeddable that too could be ported. Imagine being able to switch between rendering engines for website that don't work well for konqueror derivatives(hopefully things in konqueror will be fixed).