I don't think so. Patients will choose Walmart for everyday, acute conditions and simple maintenance treatment for certain chronic conditions. Very few procedure will be offered and no one will go there for chemotherapy or dialysis and serious conditions, much less hospitalization. Obamacare is about a lot more than the everyday stuff Walmart clinics handle.
Really, I think Walmart clinics are set up to generate Rx scripts for Walmart pharmacies. That probably explains 90% of it.