Valve has stated that they see value in maintaining a solid hardware target throughout the generation because it allows developers to target a consistent set of hardware specifications and optimize their games for the platform. This ensures that games run well and perform consistently across all devices, and helps to avoid the fragmentation that can occur in other platforms where there are many different hardware configurations.
Regarding the release of a more powerful Steam Deck, Valve has not officially commented on any plans for future hardware releases. However, it is likely that they would take a similar approach to the gaming console industry, where new hardware iterations are released every few years to keep up with technological advancements and to provide consumers with better performance and features. Ultimately, Valve's perspective on this matter would depend on their long-term
omeglz online2yu strategy for the Steam Deck and their goals for the platform.