Hi,
ACM HyperText (https://ht.acm.org/ht2018/) has a “Blue Sky Ideas” Track this year (https://ht.acm.org/ht2018/Call_Blue_Sky.html). The emphasis of this track is on visionary ideas, long-term challenges, and new research opportunities. This track is designed to overcome the constraints of the traditional review process, and will serve as an incubator for innovative approaches, risky and provocative ideas, and to propose challenges and opportunities in the near future. There are travel grants ($1,000, $750, $500) for the top three submissions.
If you have any “way out there” idea, please consider submitting it via https://easychair.org/conferences/?conf=ht18 (4 page max, using ACM proceedings template).
Cheers,
Ingmar