Specialized degree with more demand for jobs than supply of qualified candidates. Only a few schools offering degrees with different emphasis (Clemson, MSU, RIT, UF, VT, CalPoly, UW Stout). Blend of material science, technical aptitude, brand/design principles, mechanical engineering (automation/equipment, supply chain optimization, and commercial viability. You can direct your expertise to any of these focus areas. Most of the highest paying jobs would be for large CPG companies (Kraft, Unilever, Reckitt, Coca-Cola, P&G, etc), or there are more technically-heavy R&D positions at material suppliers (plastic, corrugated, solid board, sustainable materials).
With the increased emphasis on petroleum based plastic alternatives, I continue to see the degree to hold more value over time.