Sony certainly thinks so! They are coming out with devices that can be attached to a cell phone physically. With software that connects the Lens to your phone you control the results. To control connecting the WiFi between your phone and the Sony Camera using the PlayMemories Mobile App.
Sony QX Series “Lens-Style Cameras”
18MP 1/2.3″ Exmor R® CMOS sensor, Sony G Lens with 10x optical zoom, NFC/Wi-Fi® allows simple connection with smartphone, 1920×1080/30p HD video recording, Superior Auto and multi-shot layering
Cyber-shot QX10 and QX100 Lens-style Cameras
The DSC-QX10 is a 10x optical zoom. The Cyber-shot DSC-QX100 camera features a premium, high-quality 1.0 inch, 20.2 MP Exmor® RCMOS sensor.
Many years ago the incredibly talented Orson Wells predicted that someday cameras would be nothing but a lens……..I think we have arrived