Depends a lot on the type of games you want to play. AAA or competitive FPS probably gaming PC. Older games, casual, indie, etc. SteamDeck is great.

I have to say that the SteamDeck brought a lot of fun back to gaming for me. Everything's in one package, it's portable, I can play docked or lay in bed. I can suspend it and come back whenever.

I've mainly played the Witcher 3, Skyrim, Fallout 4, Noita, GC roms, Disco Elysium, Dishonored, and Stardew Valley. Some of those games I've owned for a long time and I never played them until I got the SD.

But it does make a great streaming device/glorified controller too when I want to run more demanding stuff on my PC.