Of course not purposeful. They bought what they needed and couldn't care less as long as they got what they needed.
Why would anybody care about competitors getting any components of any kind, if they get what they need?
Don't agree that Apple needs constant pressure.
Any good company gets its pressure from within (to make it's products better, to sell the next generation) and from market research and consumer communications.
I bet they know that MobileMe sucks (I gave it up as there is better stuff for free) and will do a major overhaul.
I think we will see tablets taking a big chunk out of notebooks and become the next note book generation.
The next revolutionary thing. (Dick Tracy watch that works

Could be that we'll all run around with little receivers and get the info out of the cloud via Wifi type "Gas" station network free of specific carriers.
You'd go to such a station and dial yourself into your network as they all have Verizon, ATT , but they'd also have the renegades etc.
These receivers will be able to project anything one would normally watch on a screen onto anything flat (wall , paper , desktop, side of a briefcase, even your hand etc.) so the current panels could become strong projecting lenses.
Lenses can be smaller to project, so development of image sensors is next.
Go RIM , MS and start developing or Apple will.