I would also upgrade the power supply also to be safe. As far as future proof, unfortunately no. The 1060 is coming to the end of it's run I think. The new 2060 should have been it's replacement but it's much higher priced, so I don't know if they will have an 1160 or a 2050, etc. But the 1060 is 2 years old already.
As far as is that rig future proof, no it unfortunately isn't. It might do ok a year or so, but quad core CPUs are starting to slowly go out as games become more multithreaded. So at some point you will want to look at an i7, or there newer ryzen CPUs, or a newer Intel platform like coffee lake for example. Also, you can still game on 8gb of ram, but I would recommend save up and upgrade to 16.
Future proof never really happens as you can see, there are always parts to upgrade. I just try to keep up with things as I can and update a bit at a time. You might see what you are able to find, sometimes the gtx 1070 is available for a little more now. The other day I bought an RX Vega 56, which is about the performance of a gtx 1070 to 1070ti for $340. I saw a new one a day or so later exactly like it on eBay new for 300. You would need a way better power supply, but there are deals out there.
Just be aware new cards are coming out this year so there are good deals on old cards, but you want the best you can get so that it will hold up a while.