This is great news for anyone building tools on top of arXiv data. The API (export.arxiv.org/api/) is one of the best free academic data sources — structured Atom feed with full abstracts, authors, categories, and publication dates.

I've been using it as one of 9 data sources in a market research tool — arXiv papers are a strong leading indicator of where an industry is heading. Academic research today often becomes commercial products in 2-3 years.