Yep. This is correct. The pitch is a hybrid pitch. The artificial fibres are already sewn into the pitch.
As soon as the boards are removed, the grass will be stripped from the pitch leaving only the fibres remaining. There may need to be some work done by the company who stitch these fibres to ensure they haven't been flattened due to the length of time the boards have been down. Once the soil has been levelled and the grounds team are happy, the pitch will be re-seeded and left to naturally(and artificially with the mobile lights) grow for around 6 weeks before it is ready. At this time of year, it'd be expected that the grounds team would be able to do their 1st cut within 2 weeks of seeding.
Other clubs have used the turfing method with these artificial fibres. It works perfectly fine if time is short. Liverpool used it the season before last when the bulk of the roof work was done on their new stand. The pitch would still be perfect but it is highly unlikely the club will need to do this because the window of time they have is more than big enough for the renovation work that is required on the pitch.