Check out my recent post. Once blockchain gets intergraded into the real world lets say Ethereum is the most popular one utilized. Lots of apps built off of eth currently will eventually start solving issues in the real world. Whether its data management, prediction modules, you name it. This will require lots and lots of computing power. iExec comes to rent out their cloud computing processing power to help. As well as anyone else that builds apps onto the market place. Ether2 will fix lots of issues. I still feel like the blockchain itself will struggle greatly at this high of a scale. But in a case if it even performs greatly. iExec can be integrated with many different blockchains like Cardano. In a personal standpoint, if you want to play a VR game but do not have the computer to do so, you are able to rent out computing power to solve this issue. iExec both supplies for the business and personal standpoint. Cloud computing is needed. Take Netflix for example, they feed off of Amazons cloud servers. Netflix realized its cost inefficient to host their own servers. Why not let Amazon do it and rent off them. iExec will be used in this manor but will be one of the only services off blockchain.