I’m really not interested in that. What I like about Haiku is that it focuses on desktop computers. It is designed to be used efficiently with keyboard and mouse.
Look at what happened to GNOME when they tried to do both desktops and tablets. The result is clumsy on both.
If you are after a tablet oriented OS, I would say there is no use in carrying the BeOS legacy. But let’s see what Google is up to with Fuchsia/Magenta/Zircon, I suspect their plan is to go where Haiku doesn’t 