This is a very soft and speculative question. Please feel free to downvote, close or delete it.
Studying the cohomology of moduli spaces of shtukas, Drinfeld proved the Langlands program for $\mathrm{GL}_2$ for global function fields, which was later extended by L. Lafforgue to $\mathrm{GL}_n$.
Peter Scholze has a conjectural section Shtukas for $\mathrm{Spec}\,\mathbf{Z}$ in his 2018 ICM report https://arxiv.org/abs/1712.03708 on arXiv.
Might this be used to attack the Langlands conjectures for $\mathbf{Q}$ (and how)?
What could this be used for?