Hearn's article is almost entirely inaccurate/misleading FUD.

It's possible that there will be some turbulence if we can't scale fast enough, but the Core devs have a plan that I think will probably alleviate problems in the short-term, and will almost certainly allow for massive scaling in the long-term. This plan includes an effective max block size increase to 2 MB in ~April. If any serious problems occur, it will be due to altcoins-in-disguise like XT and Classic trying to move Bitcoin development from something based on technical merit to something based on dictatorship or popularity.