Yeah but I mean in 4 years.
I don't see anyone I know needing more than 1 TB in 4 years, yet, if they wanted to run a bitcoin node, they would run out of space with their regular 1 TB HD which is more than enough for most people. People no longer store movies etc, since connections are so good that you can stream them in HD. So most HD space goes for games, and 1 TB is more than enough. The average computer user will not need more than 1 TB in 4 years at all.
We aren't going to hit 1 TB in 4 years.
You're still going to need programs, games, etc. Everything that you can't store in the cloud. Furthermore, I think there will be shift towards offline storage again because of mass surveillance by organizations like the NSA who go to the cloud hosting companies and ask them for user data.