Ethereum doesn't aim to store massive data within the blockchain itself. Instead, we're building an additional component into the network, Swarm, which essentially acts as a DHT/DFS. There are already experimental branches within the main repos, they function, but probably at a POC state.

Furthermore, a 1Gbit DL/200Mbit UL link costs $13.70/month where I live, so I think it it is already very much viable, but maybe the distribution will be skewed towards more internet friendly countries :)