IDC is tracking an overall global decline of 10.1 percent whereas detachables appear to be booming. Amazon and Huawei have both cracked the Top 5 list of the world's largest tablet manufacturers.
http://www.notebookcheck.net/Tablet-market-in-decline-as-of-Q4-2015-Amazon-now-tracking-ahead-of-Lenovo.158802.0.html