Extensible: HP Windows Phones for Business

HP’s Elite x3 is a flagship sailing into a dangerous Windows phone wasteland | PCWorld

• "A 5.96-inch, 2560x1440 (WQHD) edge-to-edge display with Corning Gorilla Glass 4 and an anti-reflective coating
• The brand-new Qualcomm Snapdragon 820 CPU with integrated Adreno GPU
• 4GB of LPDDR-4 RAM
• 64GB eMMC storage, SD extensible to 2TB
• Cat 6 LTE (“Designed for continuity,” explained Park: “We know LTE is where things are going.”)
• 8MP front-facing camera, 16MP rear-facing camera
• Dual SIM slots 
• A 4,150mAh battery (No life spec yet, but Park promised it would last “all day”)
• Dimensions: 3.29x0.31x6.36 inches
• Weight: 0.43 pounds (options could add weight)
• Durable: passed IP-67 and MIL Standard 810G, including a four-foot drop"

video: HP Elite x3 is serious business

alternative: top consumer level Android phone
LG's G5 is a radical reinvention of the flagship Android smartphone | The Verge

Both have something in common: hardware extensions.

HP device can attach to external monitor and keyboard to act as a desktop,
and there is even a laptop-like shell to hold the phone inside.

HP Elite x3 smartphone for business is also a Windows laptop... or desktop - Liliputing


LG has extenders to work as a camera, a music device etc.


The "only" problem with this logic is the price. It is likely that for less money one can purchase
a decent phone and decent laptop, or a phone and a camera.