Not sure if they already got the new macbooks ready since all rumors point to that taking a bit longer, maybe a new mac pro? But yeah, maybe also just standard maintenance.
And while one could discuss if we don´t already have more than enough linen usage i think the new busy page at least highlights one thing for sure:
That Apple is working on making all their stuff retina displays optimized one by one, store being on the agenda now seemingly. I mean look at the dimensions of that we're busy image =)