So at base ISO like 100, the Image Quality is same for a 1/2.3" sensor and say, an APSC sensor ? In that case why would anybody waste money buying a large sensor camera for taking pictures in daylight ?
Hahaha, everything in todays world is driven by consumerism. People believe that getting a bigger and better spec camera will fetch them better pix.
That's why.
Have you checked out the photos from Canon S120, G16 at ISO100 and compared it with Canon 1200D at ISO100? (1200D may sometimes appear better simply because of higher megapixels, but overall there is hardly any difference that you would be able to discern in a double blind test)
http://www.imaging-resource.com/IMCOMP/COMPS01.HTM
http://www.dpreview.com/reviews/ima...zation=full&widget=1&x=0&y=0.3137836604290278
Also if not in bright sun or studio flashlights, the DSLR because of its f/3.5 lens will start using ISO400, whereas Canon G16 or S120 will still be at ISO100 (because of the 2 stop advantage of its f/1.8 lens)
In fact for a majority of the cases G16 will trump over DSLR simply because of higher quality lens compared to el cheapo DSLR kit lens.
There is a reason why there are lens resolution and distortion comparison tests.
But then all this is something that a professional who earns money from his photos has to get into. Not an amateur.
Another reason for DLSR could be easier Bokeh achievable from large sensor formats. But to surprise you further you may get similar bokeh from Canon G16 compared to DSLR with
kit lens.
(
http://www.dpreview.com/articles/7482751855/high-end-ps-versus-micro-four-thirds) <= yes this comparison was with m4/3 but the same story holds for DSLR with kit lens too.
The only real reason why I would buy a DSLR is:
1. I am getting something dirt cheap. Cheaper than the point and shoot. Perhaps second hand, perhaps because of a deal.
2. I am into fast action photography. The contrast detection focusing of Point & Shoot cannot match the phase detection used by DSLRs. But of course there are easy workarounds by doing pre-focussing on a point & shoot.
3. I want to buy specialty lenses and filter. And the delicious prime lenses. Of course you should be aware that S120 and G16 (and others in this genre) come with built in 3 stop neutral density filter!
4. I love to lug around suitcases of camera gear and accessories. It gives me some kind of satisfaction.