Question hey i have a 1070 should i get a new graphics card ?

so basically my spec are
is a Amd ryzen 5 2600 .
b450 m aorus
kingston hyperx fury 2133 mhz 8gb ram
asus turbo 1070 8gb
750 watt g2 gold 80+
. but in a nutshell i wanted to do 4k