SEO is an evolving system and anything that goes through a process of change is not likely to die. SEO has changed from the days of the “black hat” practices and backlinks but it continues to rule in a new form. The internet is an expanding universe and just as science uses various modes to get the best research results so search engines search the internet with SEO to get the best results.
Google alone makes over a billion searches daily and unless there is a filter to sift through all the trillions of websites it will be well high impossible to glean out the chaff from the grain; in other words get the content or information you are looking for. That search is only possible with the words you type into search engines and how well they match with what is out there in the wide world of the internet. Unless you have information there that matches with the system that is used by search engines to find what the user wants then how will it be located?
Internet search is penetrating into new arenas like smartphones. SEO is changing, and it will get more sophisticated. However, as long as there are searchers looking for information there will be filters that will remove all irrelevant information and provide only the right match. SEO in the future may require more study, more understanding of the latest algorithm. With Pandas and Penguins and penalties imposed by Google to keep spamming sites out and then get them back in if they have the right SEO; doesn’t look like SEO is about to die. Websites didn’t like that they had to wait a full year to be released by the penalty imposed on them by the Penguin 2 update in 2013 to October 2014 when penguin 3 was released, Those that cleaned up their SEO were included in the penguin 3 update so how can SEO be dead or even dying?
The internet has grown so vast that there is no way you can read the whole gamut of information. You need search engines to find what you are looking for. If there are search engines then there are likely to be people who will figure out how search engines work so they can figure in that search. Those who are able to construct findable content are still continuing to register high on search engines.
SEO is now formulating into something known as best practices. In the future SEO is likely to be combination of unique and readable content, authenticity of the website and user participation and personal reviews. Already e-commerce websites that have products with a lot of personal reviews are beginning to rank higher than products which might be good but that have no user reviews. SEO is not dying but emerging into a well planned and thoroughly executed campaign. If the world is largely going to depend on the internet for marketing then SEO will be a part of that marketing tool.