It's an important breakthrough in a world where data centers burn through around 8 terawatt-hours per year just on cooling, which is about 40% of their total energy usage. The UT Austin researchers estimate that their new TIM could reduce cooling energy needs by 13% across the industry, cutting overall data center energy usage by at least 5%. That should translate to a gigantic reduction in operating costs and carbon emissions.
As for how you can get your hands on the material: it's yet to make it out of the labs. The UT team has so far only tested it successfully at small scales but is now working on producing larger batches to put through real-world trials with data center partners.