A lot of it depends on what you consider "good performance" to be. If you demand high resolution and refresh rates at maximum graphics settings, the hardware might potentially not live up to your standards even a couple years from now. Even one of today's $700+ graphics cards can already struggle to maintain 60+fps at 4K resolution with max graphics settings in some of the most demanding games. 1440p is a lot more practical to run on high-end hardware, but with RTX reflections enabled in Battlefield V, a 2080 can't even maintain 60fps at that resolution. And if you want high frame rates on a high refresh-rate screen, even today's fastest hardware can struggle to stay over 100fps in some games. On the other hand, if you're willing to run some games at slightly less than maximum settings, or at a resolution like 1080p, that hardware could maintain good frame rates quite a bit longer.
And are peripherals like a monitor, keyboard, and so on included in that cost? If it's just the PC itself, in my opinion, one might be better off not spending that much on such a system, since past a certain point, you start to see diminishing returns in terms of value. As an example, a 2080 Ti is not even twice as fast as a 2060, but it costs well over three times as much as that card. Unless you feel you need that performance in the short-term, it might be better to target a somewhat lower price level, like under $1500, and save the rest to put toward upgrades a few years down the line. Or maybe you'll find you want a VR headset or something.