As of yesterday, Sony has launched the PC version of their PlayStation Now client for Windows 7, 8.1, and 10. This service allows a catalog of PlayStation 3-era titles (which includes remakes from their previous consoles) to be streamed, in a way similar to OnLive. While the US and Canada are both supported, it's difficult to tell the other regions that it is available in, at least from Sony's official sources.
One caveat is that the service requires the DUALSHOCK 4 controller (and their upcoming, official wireless adapter if you aren't happy with USB cables). From an openness standpoint, this isn't really much better than the console, and actually worse if a far-future title becomes exclusive to it; you can't emulate software that can only be remotely accessed, but that's okay as long as you go in with those expectations. Games can be added and removed from the service with zero recourse, which means that you can lose content that has intrinsic value, especially if it's controversial. On the other hand, it allows you to experience games that you otherwise couldn't, because they were already locked into a platform. On the other-other hand, you're perpetuating that by supporting the platform, but that's your decision to make.
I'll stop that infinite loop here.
All of that aside, the service offers a seven day trial. One month is $19.99 USD, which adds to about $240 each year, while 12 months pre-paid is $99.99 USD.