The population will have declined to under 100 million. The tiny island nation of Japan will have a far larger population than Russia, the world's largest land mass.
At least 10% of the population will be infected with AIDS.
Russia will also, إن شاء الله (Insha'Allah, with the will of God), be a Muslim country. While Russia's overall birthrate is just 1.28 and Moscow's is even lower at 1.1 children per woman (2.1 is needed just for population maintenance), the fertility rate for Tatars living in Moscow is six children per woman, while the Chechen and Ingush communities are averaging 10 children per woman. Russia's Muslim population has increased by 40 percent since 1989, to about 25 million, and by 2015, Muslims will make up a majority of Russia's conscript army and by 2020 one-fifth of the population. Combined with the fact that hundreds of thousands of Muslims from Tajikistan, Uzbekistan and Kazakhstan have been flocking to Russia in search of work, as well as short Slavic lifespans (especially men) it is expected that the Russian population will be majority-Muslim by 2050.
The only way Russia won't be Muslim is if it starts building extermination camps or magically changes the Slavic ability to reproduce. Given the difficulty of the latter, combined with increasingly blatant and even state-approved racism, the former isn't out of the question. The Washington Times reports: "'Russia is historically a Slavic, Orthodox Christian land, and we need to make sure it stays that way,' said Alexander Belov, the head of the Movement Against Illegal Immigration, an increasingly powerful lobby that has organized dozens of rallies in recent months."