NexusUI is not a ‘canned solution’, but is a set of components that can be used to build custom interfaces.
NexusUI is designed to be mobile-friendly and multi-touch compatible. It can be used to enable large-scale collaborative performances, by distributing music interfaces via the Web. This makes your music controller available to anyone with a Web browser, which is now something that many people carry in their pocket.
You can get details on NexusUI at the NexusOSC site.