This is a very hard question to answer...
Personally, the thing that you want to keep in mind about consoles is that they have dedicated hardware which means devs can make their game optimized as good as they can. Even though the GPU is equal to a 7790 its still going to make games look great for the next 5 years.
PC GPU's are very different, when devs come around to make a PC version they don't know what GPU or CPU you have because there are literally thousands of combinations of PCs! So this means that GPU's like yours might only be able to keep up with the PS4 for 2-3 years.
So it will keep up but not for long...