Kind of a good question. It is possible to circumvent the opengl 4.5 requirement (and supposedly it's going to be patched in along with intelhd graphics card support). Once that happens, the minimum graphics card requirements would likely not just be a bit lower, but a lot lower, than they are now. And your processor is fast enough.

So.. yeah, either somehow add a new radeon card on the side (..if laptop, might be difficult with an egpu setup, but still..). Or wait until, or see if, HG announce intelhd and a lower res version with a lower opengl standard version requirement. Or suffer, I dunno, 5fps a second in 640x480 with the workaround in the meantime.

Hopefully someone will ask about this on the post-mortem in ten years. How they figured that adding the filters and dust, surface treatment and shaders, and making it all permanent (and forced, to conform with the ps4 version whether you want the detail up or down) was such a brilliant idea.