My main concern are games and systems that will be streaming only in the future.

I doubt that it will ever become the main way to consume games for several reasons.

1. It cuts out far too many customers with bad internet
2. It doesn't offer any advantages over a console, which offers ease of use and a standard hardware configuration. It's equivalent at best.
3. People are underestimating how difficult or expensive setting up and maintaining the infrastructure for streaming games is.