JOOK-D :
It would make more sense to get a quad core i5 (k series) or a Xeon 1230v3. These already outperform the FX's (99%) and will continue to do so, the extent to which differs.
This is true in some apps, some synthetic benchmarks and some old games that are poorly optimized for multicore CPUs.
For example, Skyrim, which Tom's uses as an indicator, was released in 2011. It uses 2-4 cores and the Havok engine, which is highly Intel optimized. It was a good indicator at the time, but is no longer an accurate indicator for current games.
In current, well threaded CPU intensive games like Far Cry 3, Crysis 3, BF 3 and 4, Metro, Naturalral Selection...you will see the FX 8350 usually ties and sometimes beats the i5 and is very close to an i7. But we're only talking +/- 3-5% difference max, whether it is winning or losing.
So for gaming you can't say one is better than the other as a blanket statement anymore. You need to know how many cores your games and apps can use and whether they are better optimized for an Intel or AMD. That will help you pick the right platform for your purposes.
But the big take-away here is that nothing is future-proof. It is always speculation, because we simply don't know what innovations, changes and optimizations are coming.