Yeah it looks like that Sam no longer works on Mira, thats a pity, since He was such a nice developer and has made some really interesting interactivity btw Max & Mira like the mira.frame, mira.multitouch object which are great. Anyway It would be really nice if someone from Cycling will continue the project. But if no one from Cycling would continue to develop Mira, I think it would be great if Cycling will give Mira as an "why not" Open source - Git Hub extension, so that much better programers that I'm, could developed it further. Of corse since Mira is still working on current IOS this will not happened, but in the future when Mira maybe wont be compatible with the new IOS it's gonna be interesting what will happened, I really hope for the best, even for the Open Sucre option in the end all will have benefit from this Cycling because they will have still a nice IOS app, and obviously the users.
I know that there are many alternative to Mira like MMF-Fantastick, C74 and of course the whole OSC world (Lemur, Touch OSC...), but I think that Mira, if would be maintained it would be still the best option.
I haven't tried Duet jet but I think it doesn't have the same really cool interaction like Mira and Max. I'm also interested if multi touch can be used in Duet (pleas let me know THX).