Universal doesn't have as many guests as Disney so there's no need to stay open past 10. Epcot, AK, and DHS are all closing between 7-10 too! But I'd wager once Potter 2.0, Kong, the JP expansion, the KidZone redo/expansion, that Lorax dark ride, and other mystery projects open up, we could Universal decide to stay open later... maybe until 11 or 12 during the holidays but only if attendance gets to at least 10 million at each park by the end of the decade! :thumbs:
FYI - Both Universal parks stay open until 1 or 2 in the morning from Christmas Day until New Years'!