Hey hey, check your facts, the Shield did get an update recently. They did in fact add ads to the home screen./s But I assume you mean a hardware upgrade.

But on a serious note I don't see a reason why I need anything else than the Shield. It has flaws and bugs but generally plays everything. Combined with my Plex home server the experience is great. Can take the shield anywhere I go and stream content from my home server.

I play everything in 4k blueray remux without any problems (except for a memory leak every few weeks).

CPU upgrade is necessary as it will bottleneck even your current 1070 in some games. This will get worse with a new GPU. I had the 6700k and got no performance improvement upgrading from a 980ti to 1080ti.

I don't know man I live in the Netherlands and it seems really 50/50 whether someone accepts "uncommon" meat. I personally feel weird thinking about eating dog/cat meat or crickets even though I understand that it is not a rational thought (assuming you're fine with other meat of course).