Update on 24 July: Now live, and seems to be working well with resort guests getting 7-days advanced access. Search the internet for 1001 bloggers and websites discussing the minute details.
There's a lot of information to unpack, and as this site is about the Port Orleans Resorts I'm not going to dig into every detail here, but basically as from the morning of 24 July 2024, the Genie+ daily ride reservation system will turn into "Lightning Lane Multi Pass". The new My Disney Experience app based system will operate more like the old FastPass+, allowing guests with valid tickets to pre-book time slots for up to three attractions at the park of their choice. A tiering system will apply, so you will only be able to pre-book a maximum of one headliner "top tier" attraction per day, and two (or even all three) lower tier attractions. Once you've attended your first pre-booked attraction of the day, you will then be able to use the My Disney Experience app to search for a fourth available attraction from any tier - which could even be at a different park if you are park-hopping - and so on throughout the day.
Additionally, there will be one or two highest-demand attractions in each park that can ONLY be purchased on a one-off basis, by separately paying for up to two "Lighting Lane Single Pass" slots per day. These will include rides like TRON, Seven Dwarfs Mine Train, Guardians of the Galaxy, Rise of the Resistance, and Flight of Passage.
Guests with dated tickets, Annual Passes, etc will be able to book up to three days in advance of their visit. Disney Resort hotel guests will be able to make bookings up to seven days prior to their arrival date - and then for the length of their stay (up to a maximum of 14 days). One nice feature is that you will be able to make your selections and ensure that you can get the specific choices you want BEFORE making any payment, so no more leaving it to fate to see what's left after you've handed over your money.
Initially the pre-booking facility was going to be limited to guests who are already in the USA, but Disney has now added Canada to the system and hopefully other countries may follow soon, so (for example) UK guests travelling to a Disney hotel are not placed at a seven-day disadvantage compared to US residents.
Pricing is still to be announced, but it is generally expected that it will be roughly in line with the seasonal/date-based pricing policy of the existing Genie+ and Individual Lightning Lane systems, so expect to pay $15-$40 per person per day for the Multi Pass option, and $15+ each for the named Single Pass rides.
There is more information all over the internet of course, but you could start with the Disney Parks Blog announcement or the Walt Disney World website Plan Ahead & Save Time in Line page (may not be easily viewable outside of the USA).
