Apple's market share in tablets is on the decline, from almost 60% to now just over 50%. It will likely decline further. Apple is sitting on their laurels, and the competition is heating up.
http://www.zdnet.com/idc-report-tablet-market-grows-nearly-50-percent-apple-loses-ipad-share-7000006891/
http://www.zdnet.com/idc-report-tablet-market-grows-nearly-50-percent-apple-loses-ipad-share-7000006891/