Back when video editing on a computer was more hardware than software, this would have been big news. Now that it's more software than anything else, it's very understandable. The software business model is vastly different to that of the hardware one. Also, HD-SDI capture wasn't expensive because the circuitry was expensive - it was expensive because only three people wanted it and they didn't have the budget concerns that us end users do. Once the market for such capture became large, there was a rapid price descent from the $10k realm, to the $2k realm and now they give them away in cereal packets.
With software, you can afford, to an extent, to develop for the niche market. With hardware, it gets more expensive to do so. That's not something that's going to change over-night.
What will happen though, is that there will be a period of users of photography and videography buying on price. There's always an element of this, but it will increase. Eventually they'll get fed up with the bad quality of work, but then they'll go back to buying on quality from people they trust to get the job done to the quality needed on a reasonable budget.
In most markets though, the price of the commodity product doesn't invalidate the high-end quality purchase for the right end user. A mini or a civic doesn't invalidate the porsche or ferrari. The bottle of bells doesn't invalidate the Brora, The Macallan, Ardbeg, Aberlour etc. Those that drink the good stuff laugh at the bells drinker, and the bells drinker just gets on with it, their taste buds never experiencing the vast vista of taste possibilities beyond.