Sam Mow is just one voice.

We already know that we are getting seg wit...

and seg wit has to be in place before lightning network and sidechains will become potentially more reasonable and practical.

Really, we would have to see how they play out in terms of their implementation and security etc... which seems to be quite a distance down the road... because they are mostly theory at this point, and not even really being tested on any broad application level, as far as I know.