I see some impact on Ocean exploration from maker and citizen scientists; but I think that the big impact will be surveys of lakes, streams, and rivers. Maker and citizen scientists won't all have access to ocean-going vessels, so ocean exploration will be limited to "close to shore".
The initial advancements will come from forward-looking state Departments of Natural Resources. If they can organize and train maker and citizen scientists equipped with their own OpenROVs, valuable surveys can be made faster and with less expense. DNRs will be able to have a better handle on water quality, fish populations, etc. with their current budgets. Maker and citizen scientists can feel that they are contributing to their community's quality of life, they can be a part of something big.
The key will be how well the professional scientists are able to interact with we amateurs. Will we see a position at a DNR or even Woods Hole with the title of "Director of Volunteer Scientists"? With the internet and social media, how professional and volunteer scientists will interact will be exciting to experience!
By the way, since I live in Minnesota (Land of 10,000 lakes), I do have a slight bias towards lake, stream, and river exploration.