The major security vulnerability affects networking equipment used to connect to the Web, the companies warn.
Apple and Samsung will account for almost half of those shipments, but vendors in emerging regions will increasingly move the market, says research firm Juniper Research.
Juniper Research says tablet gaming should expand quickly in the next few years as the devices' graphics get sharper and as storage and broadband penetration grow.
The nearly $100 billion app market may not be dominated by tablets, but slate owners spend more on average for content than their smartphone counterparts.
Juniper Research finds worldwide carbon dioxide emissions from cell phone charging will more than double by 2019.
LTE will run on 1.8 billion devices by 2019, predicts Juniper Research, representing 22 percent of global active connections.
With a host of new fitness trackers, smartwatches, and other computer-enabled gear expected on the market soon, analytics firm First Insight forecasts which ones will become big sellers.
Consumer smartphones, safety regulations, and efficiency savings are driving Internet connectivity in vehicles, and will become standard features in a few years.
Morgan Stanley analyst Katy Huberty also says no other company comes close to Apple's brand loyalty in the mobile market.
Shipment growth of the ultrathin computers could triple that of tablets, though tablets will retain the edge in total volumes, Juniper Research says.