Honestly, when I imagine a USSR that somehow managed to survive to the modern day I feel like it looks something in between what Russia and China look like today. China being the model for investment and expansion but with a lot of push back and a yearning to call the shots in that relationship again. It really depends on what reforms are implemented and how they're enforced too. Alternately I could see The Soviet Union become a confederation lacking leadership at the national level, individual republics start having more say so over policy in their jurisdiction. You could see different parts of the country with insanely different levels of development.