Travel Las Vegas teased its record-breaking MSG Sphere on July Fourth. Here’s what to know about it. July 5, 2023July 6, 2023 Anthony Robledo, USA TODAY Comments Off on Las Vegas teased its record-breaking MSG Sphere on July Fourth. Here’s what to know about it. From its record-breaking size to the U2 concert series, here's what to know about the MSG Sphere before its debut on Sept. 29.