Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Linux has become omnipresent. It's presence is so deep that a user may not even know that he/she is in-fact using Linux, the kernel. The GNU combined operating systems do give Linux its identity.
However, in recent times some GNU/Linux based products have become overly popular. Some have even started stating that xyz is outshining Linux. Which I don't think is the case.
Looking at Google trends, you will get an idea about what terms are more popular on Google -- which means what are people looking for.
We looked for a comparison between 'mother' Linux and grandson Ubuntu and newly born Android. You can very clearly see that queries for Linux have come down recently as Ubuntu picked up.