Slightly off topic, sort of, but not really; and sort of in answer to some of the questions posted in this thread.
With regards to what Google would want is easy - completely unoptimised pages, honestly written, that are only what people want to read.
Google wants to sell more through it's Adwords, the best way to that is to have more market share of the searches made.
If the results get 'worse' and people dont like them then they will use other search engines, less searches for Google, less revenue for Google.
However, in and of itself, Google wouldn't care less who is number 1 or number 10 or number 1000 in the SERPs, so long as good, relevant, results will keep people searching through Google and not the opposition.
Of course, expecting SEO to suddenly disappear is ridiculous and Google knows this. They know that given a reasonable amount of time that people will 'game' the system.
So, what do they do, they regularly tweak the system a little, try and remove some of the currently 'gamed' results from their current algorithm.
Then periodically, they significantly change the way something works - net result, major changes in the SERPs - make those people 'gaming' the system have to more or less start over again.
Great for some sites; horrible for others; excellent for the SEO industry.
The bottom line for me and what I take to all the work I do is this; don't try to game the system per se (of course you make use of your knowledge of what will work and what wont). Don't rely on any one thing to get your site performing well.
10 years ago, you could rank purely by keyword stuffing - GONE.
5 years ago, you could rank purely by buying 1000s of backlinks - GONE.
For 3 years till 2011 you could rank by purely having loads of links from Twitter - GONE
Facebook, Pininterest, quality backlinks, you name it; all will have their day and then be gone as a major signal.
So what do you do? Go broad.
- Make sure you site is well written and relevant using the keywords you want to tagget but using similies etc too (Semantics sounds like the next big thing).
- Make sure your internal linking and site architecture is well organised and optimised (good link text, title tags etc)
- Make sure your image alts and titles are relevant
- Only bother with backlinks that are likely to bring business in some way and are not just for being a backlink. (This is where getting creative can help and where SEOs will make most of their money - it's time consuming and needs practise/experience most of the time)
- Utilise the other social media platforms as relevant and useful
- Where relevant to your site and business model: Don't forget offline marketing/PR; this can get the best backlinks of all as well as bring you other business.
...
I could go on, but wont - so I will sign off this missive with my main point.
"GO BROAD in your SEO"