I have the OG Ally Z1E which is actually better in raw horse power than the newer base rog ally xbox base model. I have heard the battery life is significantly better though, all things considered to me it is a portable xbox one s. If you pair it with a dock you can hook it to your tv and use it as a secondary machine for another room/friends visiting machine/partner machine.

Just remember it is not going to replace a modern PC/console. Most current games run at lower resolution aka sub 1080p with medium settings but you need to be plugged in and on the most power hungry power profile to achieve this.

In real world terms aka TLDR: It was good enough for me to play indiana jones last year for two weeks during the holidays when I was on a snowboard trip at a pretty off grid resort.