I recently installed on a laptop with a high DPI display.
Turns out, the configuration needed numerous changes, which I will detail here.
I recommend that you compute your DPI first.
https://winaero.com/blog/find-change-screen-dpi-linux/
First, for the openbox menu, conky, and others, changing Xft.dpi.
For gnome based applications this is recommended:
gsettings set org.gnome.desktop.interface text-scaling-factor 1.5
For Sublime Text you need to add "ui_scale": 1.5 to user configuration.
Finally, the scaling of urxvt makes the urzvtq dimensions a bit large, so I modify geometry 200x24 to geometry 200x16 inside /usr/local/bin/urxvtq. We rely on a width larger than the display to force Openbox to auto-shrink it.
For the console displayed at boot, I ran pacman -Syu terminus-font and then modified FONT=koi8u_8x16 to FONT=ter-932n inside /etc/vconsole.conf. I prefer koi8u_8x16 aesthetically, but it is too small on large displays.
To fix the cursor several files needed to be modified from Chameleon-SkyBlue-Regular to Chameleon-SkyBlue-Large. This includes ~/.gtkrc-2.0, ~/.config/gtk-3.0/settings.ini, ~/.icons/default/index.theme, and ~/.Xdefaults.
You may also want to adjust ~/.config/tint2/tint2rc by adding scale_relative_to_dpi = 140.