see dxo marks are nothing in front of but since 100 mp is only determines how large photo can be print . that 100 mp =100 inch of photo print not the digital print . in digital print 16 mp is enough and if you want to print the large photo you will require the 100 mp.
considering about your facts 12 mp digital print is more than enough and only matters the sensor size as we know sensor size in smartphones is ridiculous small we can expect that mobile photo could ever beat the camera hey but in future it will . but in current tech format digital camera and smartphone camera are nearly equal
Megapixels do matter when looking photos on a big screen or while printing them on a glossy paper. But practically we use them in social media and other misc activities. For main uses people do use DSLRs.