The always-on nature of phones and tablets is incredibly convenient. Wouldn’t it be great if your (non-ARM) laptop or desktop could do this too?
No, it would not.
My laptop is not a phone. I do not want it to notify me about things when it's inactive. All I want from suspend to RAM is for it to quickly[0] return to its previous state[1].
[0] Compared to suspend to disk, even with an SSD
[1] This isn't an excuse not to save work before suspending