Well, I whole-heartedly disagree with this. Especially the part regarding unoriginal gameplay, mobile games actually have to be original since it solely uses the touchscreen which no other platform does. Just because we see a lot of clones doesn't mean these games haven't evolved in such a way where their gameplay is unique by themselves. I'll admit, since the platform is new, that many developers haven't figured out how to streamline their controls, but I attribute that with mobile devices being new platforms.
And, IMO, that's a pretty narrow view of what a game is. A lot of of the older games arcade games didn't have fleshed out stories like PAC-Man for example yet they are still called classics today. Not every game has wholly original controls, many a game over the last 5 years have copied Batman's combat system or Gears of War's cover system it's not that unusual. We see a lot more clones on the mobile side because again, the development of a mobile game is cheaper and people can afford to make cheap cash ins that can sell for a dollar, unlike on consoles.
Lastly, there have been plenty of original non-port games that were both critically acclaimed and well received from audiences found only on mobile devices like Blek, the Rayman Run series, Little Inferno, The Infinity Sword series, and the Lost Wind series to name a few.