The ideas behind ZenCash sidechain looks promising.
In addition, required ZenCash for staking is 500 ZEN, which makes it reachable for ZenCash investors.
I think sidechain and its big potential will contribute catching more attention of potential investors and more flows of money into the ZenCash project.
Is side chain supported by super nodes only?
Super Nodes will be more powerful than Secure Nodes and will be tasked with managing key network and system functions such as
hosting multiple services on sidechains, tracking and measuring Secure Node uptime, and queuing the node payment schedule for miners.
The two major improvements Super Nodes bring are to transition tracking and payments on-chain, or within protocol, a major change from the current system where such functions are executed on external server clusters; and the introduction of sidechaining elevates the ZenCash system from a pure cryptocurrency to a platform on which an unbounded set of services can be built. The value proposition of the system then becomes more than the utility of the currency, but now includes the utility of all future services that will be layered onto our infrastructure. A small sampling of such services which are already in planning include a distributed file storage system (ZenPub), a secure messaging system (ZenChat), a computation-for-rent system akin to AWSs Lambda Functions (ZenGrid), zero-delay payments (InstantZen), and a decentralized exchange (ZenXchange) with a fully-collateralized price-stable asset called ZenUSD (USDZ).
https://zencash.com/assets/files/Zen-Application-Platform-Whitepaper.pdf