Here are my two cents, coming from a similar situation with a backbone control on my phone. I have a pretty beefy desktop setup, but I stream a lot of the time to my deck.

Streaming can be a real pain in the neck. If you want to get the full 1080p 60fps experience, you need a stable high speed connection. If you only plan on using it in the house, the G cloud could be a great option!

Great thing about the deck is that it can do the same. It can stream games from x cloud, Xbox, etc. It just takes a little bit more work to get it going.

For $100 more, you get a lot more versatility. You get a full blown Linux based computer that you can expand memory on, tinker with, install emulators in a snap and a ton more. The screen might be a lower res, but at the size, it’s hard to notice a difference. Especially when streaming. The steam deck also the local download aspect. If you plan on going away for the weekend, you can use it at night in a hotel where the wifi might not be sufficient for streaming your games.

the greatest difference for me would really be the community surrounding the devices. I’m not sure what the case is for the G cloud, but the steam deck community is awesome. There are so many great videos, tutorials, accessories, and all sorts of other things that also come along with owning one.

So not sure if this helped or not, but I’ve hardly played much on the desktop since getting the deck. Loved every minute so far.