Russia would totally pwn US in another war.

Not really. Russia is currently researching on improving on technology from post-world war II. The United States is currently working on "futuristic" weapons, so so far, the United States can take on any country 1 on 1. China wouldn't be able to beat us unless we did a war with swords and shields cause they would outnumber us, but that's not what we are using.

Those futuristic weapons are a bit.. horrible. The laser is inefficient and an official said that the Soviets had something like that back in the 1970's. Seriously, what's more powerful, futuristic or not, than a nuke or a nuke-like thermobaric bomb. Especially when you can attach those to a missile that can evade your little missile defense systems . A war between Russia and the US will likely result with the collapse of both, but I think that if it became a total war, Russia could win. They have much better bomb technology, a larger reserve of nukes, and more modern ways of launching them.

All USA's Nukes > All Russian Howitzers