Not a new idea though - Sony's add-on modules were launched three years ago. I thought they had big potential then, basically parking the smartphone tanks on the front lawn of 'proper'cameras but after an early flurry, sales have been slow and there hasn't exactly been a flood of similar products. It seems that mass consumers are not interested in carrying extra bits and pieces - it needs to be integrated into the actual phone, at the press of a button, without adding bulk.
Enter the iPhone-7 (amongst others) with dual lenses and sensors. There's a lot that can be done that way, with software merging the images from two (or more) cameras to mimic the effects of one larger sensor, and/or different focal lengths, without affecting the form factor. Early days yet, with reports of shallow depth-of-field effects being somewhat subject-dependent for the software to work well, but the potential is obvious. Shallow DoF and that 'professional' look is one of the increasingly few things that draws buyers to DSLRs and is a mainstay of wedding photographers.
Purists may scoff at it, but the danger - if that's the right word - is that it might actually work
The effectively larger sensor area will also improve low-light performance substantially and reduce noise.
for me phones are for calling people with and it's only recently I became vaguely aware of texting, being able to go on the net and taking pictures 
