I don't think it has any long-term impact. It's just silly.You've seen the video from from the State of the Union last night https://youtu.be/ppoElx09wFk
Two questions:
1. Did this hurt or help your side? I"m not asking here whether it was proper or not or over the line. That's the next question.
2. Was it "over the line" for Pelosi to rip up the speech? And "over the line" is intentionally vague. You may be Pro Trump and think it helped Trump and it was over the line. You may be Anti Trump and think it was over the line and it hurt Trump. Or any combination of the two.
Clearly, they don't like each other and that impacts their ability to work together. Pelosi was over the line, but it was a partisan ploy to please her supporters and attack Trump.
The speech itself was just the typical SOTU where everything is great, but Trump created 'TV' moments that made this perhaps more entertaining than a typical speech. I don't think the speech was really anything that shocking or offending to warrant that reaction from her, but I don't think it makes her look very good.