There are (at least) two separate things going on. Meltdown, the flaw exclusive to Intel and some ARM CPUs, is very easy to exploit and is the one being patched by OS vendors.
Spectre is a whole other can of worms, on the one hand it's more tricky to exploit, on the other hand there might not be an easy fix and people are speculating (no pun intended) that it will have to be dealt with in hardware.
