The next granular sampler/Synthesizer is not a commercial product but a scientific work. The Collidoscope is an interactive, collaborative sound installation and granular music instruments that allows participants to seamlessly record, manipulate and explore real-world sounds. It was created by Ben Bengler and Fiore Martin for a reasearch project at the Center of Digital Music at Queen Mary University of London.
The granular synthesis engine is based on Ross Bencina’s paper Implementing Real-Time Granular Synthesis, on the TGrains Unit Generator of the SuperCollider language and on the Cross-modal DAW Prototype developed in the EPSRC funded project Design Patterns for Inclusive Collaboration (DePIC)
Collidoscope is probably the granular sampler/Synthesizer for everyone. From young to old, anyone can operate it, record sounds and play with it. Due to the simple but large interface design, musicians (amateurs/professionals) and non-musicians can explore very easy new sounds.
I would be glad if they decide to build the device in a small series and then put in public places where people can play with it. For example, I can well image it in music museums or universities. If you want to play with it then check the website or the Twitter account of the developers regularly where they will announce where they are currently on tour with the device.
More information here: Collidoscope