if not before, the better plan if one wanted to switch from PS4 to something else would be to hang on to your potentially exploitable console and keep it offline until someone releases an exploit. If Sony is able to fix the hole with a patch any unpatched boxes immediately jump up in value, like we saw with the Xbox 360 and PS3. That of course means giving up online features and possibly new game releases for a while, but if you're one of those users who doesn't game online and/or uses it mostly as a Bluray player that might not be a big deal. You can then use the money to build a budget gaming PC that'll beat the pants off of any of the consoles.
Where does the PS4 hold its OS? If it's on the HDD you could just back it up to one or two others and let them sit around.