I think Tosca is the perfect end for the Italian Ottocento. A powerful drama, well served by the music, but especially by the singing voice. This is the essence of the Italian opera. Of course, a lot of things have happened between Rossini or Bellini, and Puccini: the progressive retirement of the 'solita forma', the great dramatic impulse of Verdi, the influence of German opera and the greater importance of the orchestra... but the core, the basic truth of presenting the "dramma per musica" singing, is still there, and masterfully presented by Puccini.
I agree.
Trio Puccini/Illica/Giacosa had a wonderful theatrical sense, and Tosca is probably their crowning achievement in that way.
Something that lacked for the most part to the other major italian composer of the period.
In the context of the day, "Verismo" -- exemplified by, a.o. Puccini, actually,
yes.
http://en.wikipedia.org/wiki/Verismo_%28music%29
All I can say, and it is somewhat true, "things were different back then

"
Verismo, as a music genre definition, is a flawed term IMO.
Used as a term to specify a time period in the italian Opera is more fitting (but I always preferred the name Giovane Scuola).
I'd go as far as to say Cavalleria Rusticana wasn't really born as a verismo opera, just was the one which started the phenomenon.
I regard Mascagni as a talented composer whom always tried to fill the source libretto with his passion but somewhat lacking in term of vision.
He just adapted his music to the libretto he had at hand.
That's why I think Cavalleria is a product of coincidence more than a pondered concept.
In fact there is very little verismo in it.
Mascagni's Sicily is totally faked, as for example there is very little Japan in his Opera Iris.
However because of what the source material was and because of Mascagni talent the final work resulted in a more fast paced and thrilling piece which in a sense revolutionazed what was the italian Opera landscape at the time.
After witnessing Cavalleria success, many italian composers raced to blatantly copycat the "winning formula" (those consciously tried to adhere to "verismo").
In Pagliacci, the sly Leoncavallo, even inserted a supposedly programmatic manifest in the prologue.
However there wasn't really any "winning formula" to copy from, it was just a combination of lucky factors (good music by Mascagni was one) and thus very few imitators achieved (durable) success and soon then phenomenon died out.
And this is even coming from one of those awful people who pretends to like atonal music to impress people on the internet ;-)
I'm impressed
