I see you've boughten the myth that this is about privacy in someone's own home. It's not. The decision did not address the police or government's ability to enter or search your property. The government/police have the exact same power now as before.
This ruling protects gay sex wherever it is: home, public park, public bathroom, parking lot, alleyway, etc. It is not just what goes on in a home. Do you think that this ruling will make more or less likely that a local government will try to prevent homosexuals from turning public places into their new bedrooms?
You ask what business is it of the government? Perhaps the real question should be who decides? A handful of unelected officials in washington who won't have to live with the results of their decision. Or by the people who live in the city or state through their elected representative. the People who will have to live with the results, and the representatives who could be voted out if the people don't like the results. Which way do think will advance freedom most?
The Texas law on homosexual sodomy was poorly constructed and deserved to be struck down. This ruling does not open the flood gate, as you have suggested, to permit gay sex in public places.
Do you think that this ruling will make more or less likely that a local government will try to prevent homosexuals from turning public places into their new bedrooms?
That would depend on the standards of the communities involved, and how much resources they wished to devote to this activity. I would prefer that community standards be applied evenly however, meaning standards on public sexual behavior should not just apply to gays.
Perhaps the real question should be who decides?
No, from this decision it would seem that the judicial branch decides whether government has a compelling interest in regulating the private sexual activity of consenting adults.
Which way do think will advance freedom most?
I prefer limiting the power of legislatures in areas where it does not have a compelling interest. That includes limits on state and local legislatures. Thats a limit on all forms of government, and protects individual liberty.