The SQ/MI seats could also be re-upholstered along with Wi-Fi and wireless entertainment installed and added prior to entering service (in a faster timeframe) assuming QF does pick up the remaining ex-SQ aircraft and assuming no seat-back IFE is installed.
According to the article, they'll (likely) be the first 737's to undergo refurbishment (new seats, carpets, overhead bins). Would presume they'd fit out Wi-Fi during this process also. As to whether these would count to the 42 committed to being upgraded remains to be seen.