Lucas123 writes: Sony has warned investors that it expects to take a hit on expected earnings, due in part to the fact that demand for Blu-ray Disc media is contracting faster than anticipated. In two weeks, Sony will announce its financial results. The company expects to post a net loss. Sony's warning is in line with other industry indicators, such as a report released earlier this year by Generator Research showed revenue from DVD and Blu-ray sales will likely decrease by 38% over the next four years. By comparison, online movie revenue is expected to grow 260% from $3.5 billion this year to $12.7 billion in 2018, the report states. Paul Gray, director of TV Electronics & Europe TV Research at market research firm DisplaySearch, said consumers are now accustomed to the instant availability of online media, and "the idea of buying a physical copy seems quaint if you're under 25."