Someone please kindly explain it to me

Don't know if this is correct, but on the movie Tamako actually explain that the modern world is just Hasegawa bugging Tama data, so basically when Tama wake up, all of them are actually still alive. But at the same time, who knows Sorachi sensei might just trying to make us feel relief from it by giving some hope, or...you can interpret it yourself by choose which ending you want. (=・ω・=)

No