Heh, I won’t
See, the thing is that what you’re saying is what a lot of tablet advocates have been saying ever since they started being a “thing” a couple years ago - namely, responding to the general criticism by pointing out X, Y, and Z situation where someone’s using them for something. But just because you can use a tablet for some task doesn’t make it necessarily a good fit for the job; more often than not it’s a kluge just to get it to work, when a real general-purpose computer would fit the bill much better.
Of your examples, the only ones where it would even be as good a fit as a proper desktop are the remote and the wifi control surface - and even those are extreme corner-cases. (Autonomous homes have been perpetually “just around the corner” for about fifty or sixty years now, and there’s only so many control setups that are equally well-represented by touchscreens as they are by discrete physical controls and readouts.)
So arguing that tablets overall are comparable to a real computer by way of those examples is like saying that a sharpened rock is as good as a modern box of tools because it can fill most of those roles with enough creative problem-solving and elbow grease. Technically it might be true, but it’s missing the point that the toolbox is a massively more versatile and capable solution.
All of which is only halfway relevant anyway, as my point wasn’t that tablets are useless (they are, but that wasn’t the point I was trying to make,) but that Haiku (like any other desktop OS) is just plain not well-suited to the UI constraints of a touchscreen-only device, and trying to contort it to fit those constraints is a waste of effort because then you’d have an OS/shell that worked well on a tablet from which you could run…a bunch of applications that still didn’t.
(You could maybe reuse the Haiku internals to build a separate tablet/phone OS around, as Google did with Linux and Android, but you’ll note that even Android didn’t really hit it big until it had a decent base of Android-specific software to rely on. An OS without applications is just a nice car with nowhere to drive to.)
You’re right that BeOS got to be great by deciding what it wanted to do and then doing it really well, without bothering itself about how the major contenders did things. That’s exactly why trying to turn Haiku into some kind of nebulous all-things-to-all-users God-OS is a terrible idea; Haiku is derived from BeOS, which was designed specifically to be the best damn desktop computer OS out there. You’ll no more get good results trying to turn it into something other than a desktop OS than you would trying to hammer nails with a pocket watch.