It always helps to keep things in context. Computers are calculators, nothing more. The only reason one could pass the Turing test is by being programmed with all the right answers. Data speed or storage reaching a certain point does not spontaneously combust to become a "living being", so far. It just becomes a better, faster calculator.
A better faster calculator that can be used for massively more interesting and useful purposes, in a much cheaper fashion than before. For an example take a look at this TED talk:
http://www.ted.com/talks/richard_resnick_welcome_to_the_genomic_revolution.htmlMoores law for genetics. Soon we'll be able to sequence our genomes for a pittance. And by soon I mean within the decade or sooner.
With regards to combusting to become a living being? That's a tough one. There are several theories on that. I think Ray Kurzweil thinks that it's all about the number of connections, and theorizes that computers will have the same number of connections as the brain sometime around 2035 if i remember correctly. Also worth reading is this:
http://singinst.org/overview/whatisthesingularity/But there's someone else who thinks Kurzeil radically underestimates the number of connections needed.
I'm really not sure whether there will be a singularity or not. The reality is that today 'greater than human intelligence' already exists IMO. Think about how smart someone with a computer is vs without. Think about how smart someone who has access to the latest technology of any sort is vs someone like this:
http://thecnnfreedomproject.blogs.cnn.com/2012/02/13/hope-for-vietnams-children-of-the-dump/?hpt=hp_c1Today we've already seen years of exponentially growing intelligence. Computers are designed with computers. Then those new computers are used to design the next breed, which leads to exponential advancement.
So there are two forces that pull on eachother I think. The people who have access to technology get smarter and design better technology and pull away from the 'have nots'. But then there's the other effect where things keep getting cheaper and more accessible to everyone, preventing the 'have's' from pulling away too far. Think of how cheap it is today for someone to have a smart phone which has more tech in it than mainframes did maybe 50 years ago! But the pace keeps increasing. There are things like this:
http://www.ted.com/talks/anthony_atala_printing_a_human_kidney.htmlbasically 3d printing is becoming more and more accessible, even for biological tissue.
There's also talk that some company has figured out how to take your cells and convert them back to the precursor to stem cells (pluripotent stem cells) with full telomeres in place (resetting the time clock basically)
http://www.investorsinsight.com/blogs/john_mauldins_outside_the_box/archive/2011/02/28/want-a-new-cardiovascular-system.aspxSo people may not need stem cell donors they may be able to reuse their own cells.
Lots of stuff to be both excited about and fearful of as well!
But as someone else pointed out the food vs growing population part is a bit scary. It sounds like yields are no long increasing at the same rate as before, and top soil continues to be depleted.. Not sure how much further technology can help there..