Maybe they won't make a newer non-retina but Apple has done pretty well in the past in OS X support of old gear. Yes you'll get an PowerPC owner griping but that was dropped in 2005 ( http://www.cnet.com/news/four-years-later-why-did-apple-drop-powerpc/ ) and Apple keep issuing OS X support till very recently.
While I can't tell you of the future, I think it's a good machine to have.
After much gnashing of teeth, I've decided that the non-retina Macbook Pro is the best for me. But I'm reading everywhere that the product is dead as far as Apple is concerned. So, am seeking opinions on buying this discontinued or soon-to-be product - would I be making a big mistake here? Especially re for future Support?