I made a tool for pausing every game (except online games, obviously). There are some free ones that do that, even on steam. If that's what you mean?

If pausing the whole pc á la standby is what you mean, then you could simply try hibernating (maybe after pausing like above). Most games actually can be resumed afterwards. Pc is totally off.

But yes, that's probably the only thing a switch (wifey has one, hence i know) can do great. Besides total portability...