First-order effects

• Barcelona hotels lose roughly 30% of peak-week MWC demand to home-share hosts, with the displacement concentrated in exactly the high-rate conference window where city hotels earn their year.
• Airbnb gains a marquee proof point that its supply works for dense, date-certain business events — ammunition for selling corporate travel managers on the category.

Second-order effects

• Corporate travel programs are pushed to legitimize home-sharing as a bookable category, the motion behind Airbnb for Work's later growth to 700,000 companies.
• Hotel chains face eroding pricing power at mega-events specifically, since hosts can add supply for a single week — the dynamic AirDNA documented again during the World Cup group stage, when 52,000+ new listings appeared in US host cities as hotel bookings underperformed.

Third-order effects

• Event economics bifurcate: lodging supply becomes elastic around host cities while fixed hotel inventory cannot flex, shifting event-week revenue toward platforms and individual hosts — and concentrating risk there too, as the later MWC organizer's 20% workforce cut after the 2020 cancellation showed how exposed the whole event-lodging complex is to a single event's fate.
• If business travel normalizes home-shares the way leisure already had — consistent with Second Measure's finding that Airbnb reached nearly 20% of US consumer lodging spending by 2018 — the structural line between 'business hotel' and 'short-term rental' blurs into one competitive lodging market.