The largest geothermal plant in the world is only 1.5GW, in the United States, which is over double all the plants combined in Iceland. The second largest is 1/3 that, in Mexico. [1]
There is no "ubiquitous" geothermal where there also high power usage. Data centers have to go where power is, not can be.
[1] https://en.wikipedia.org/wiki/List_of_geothermal_power_stati...
Related, it should surprise no-one that the tech giants are interested in nuclear [1], including small reactors [2], rather than waiting for the utility monopolies [3] to raise an arm and actually generate more power [4].
[1] https://www.cnbc.com/2025/03/12/amazon-google-and-meta-suppo...
[2] https://www.sciencenews.org/article/small-modular-nuclear-re...
[3] https://floodlightnews.org/fraud-and-corruption-on-rise-at-u...
[4] https://decarbonization.visualcapitalist.com/animated-70-yea...