The level of control these companies assert over our young people (directly through testing procedures and less-directly through influence over their futures/distortion of curriculum goals) is a symptom of larger problems in our education system. These tests are also hugely expensive. The answer, however, is to increase the amount of testing we're doing - not eliminate it. The 'problem to be solved' is to create a way to integrate trusted assessment into everyday instruction more often and less intrusively.
This requires us to develop a way to accredit (through national scale use/vetting) assessment materials on a much smaller scale. PARCC, ACT, et al. will maintain their current level of influence (functionally, not politically) so long as we can't assure that teachers are assessing their students against agreed upon benchmarks.
If these benchmarked assessment materials could be integrated into everyday instruction (which, as a teacher, they surely can be) AND we can accredit them as accurately assessing student ability on "competency X' then we will no longer need centralized, high-stakes assessment.
This accreditation will come from a decentralized exchange of classroom instructional materials/artifacts which will allow for the 'cream' (i.e. materials that accurately assess 'competency x") to be used, assessed, modified, re-used and finally accredited. Currently, teachers are silo'ed and rarely exchange learning materials beyond person-to-person contact or by physically gifting photocopies. Google docs facilitates exchange with real gains in productivity, but only within your immediate department (which could 4 people, could be 20 - but will hardly be >1000). We need the ability to fluidly exchange learning and assessment materials from all over the country/world that can be easily personalized for our classrooms.
As we more thoughtfully mediate the average classroom (which is inevitable) I hope we see these sorts of changes - but right now I don't see very many edtech designers attempting to create tools that will enable my teaching in this way.