Security at events are ramping up to an all-time high. Especially in the age of 24-hour venues, majors now see a need to not only protect their patrons, but also protect their assets from potential theft. As such, Final Round 2018 has instituted a clear bag policy for this year, which will have its attendees carry all of their belongings inside of a clear bag. If you are unable to do this, you will have to carry your items in your hands, as there will be no other bag allowed inside the venue.
As DeeDogg explains, this creates a potential source of contention among players. As noted, players with larger joysticks — such as the Qanba Dragon or HORI VLX — are left out in the cold, as their joysticks are too large to fit inside the provided clear bags, yet too heavy to comfortably lug around under their arms. He also postulates that this will do very little to stem the tide of theft — but could potentially clear up other security issues.