> The GTX 460 came out six years ago.

In your opinion, what's a reasonable timeline for hardware incompatibility with a terminal emulator? (That's an odd sentence to need to type...)

I think the real question is what benefits do OpenGL give to the terminal emulator that other solutions doesn't. And do they even need to target the latest versions? Maybe using OpenGL actually gives a huge advantage, but the bits that do work just as fine against an older version?

My notebook (Medion Erazer) was produced 3 or 4 years ago. Currently it has i7 CPU, 20GB of DDR3, but it's not capable to handle basic TERMINAL EMULATOR. It's time to upgrade.

I suspect a covert agreement between hardware vendors and vendors of terminal emulators.

This isn't your fault, but nVidia often doesn't update their product pages for older products even if they release new drivers that support newer versions of OpenGL on older products. The GTX 460 supports up to OpenGL 4.4 according to wikipedia, and I've found driver release notes that officially mention OpenGL 4.3 for the GTX 460.