They said at one point that their focus is on portrait, which is a pretty good indicator what their immediate interest (at least) is. That doesn't mean they won't eventually focus much more on landscape, or make it easier for others, or that Nemo won't focus on it. It doesn't make much sense for it to be a priority right now, given that they're clearly launching w/a slate device. But who knows what'll happen not too long after launch, especially if the "Other Halves" are not just NFC triggered sw auto-runs, & can also do hw augmentation in which Jolla releases their own "Others Halves", or does so with partners. (But the latest speculation is that "true hw augmentation" is probably unlikely)