Perhaps for the size of the room. When listening point is 2m away from the speakers your your speakers will deliver 93dB from just 1W. There will be 6dB drop for double the distance, but 3dB gain from room reflections and another 3dB from the presence of the second speaker resulting in unchanged 93dB at 1W. For the loudest forte of the orchestra (that your neighbors just adore, I’m sure) you don’t need more than 103dB resulting in 10W of required power. In larger room when you’re at 4m distance you will need 40W. My friends have very large room, open to the large kitchen with listening position likely around 8m - they would need at least 160W. Speakers that are 3dB less efficient, like mine, would require in that room 320W. Also, maximum amplifier power is specified usually at 4 ohm load and only half of that for 8 ohms.
1000W is overkill in any (other than ballroom) room, unless "When I listen to Black Sabbath, my neighbors listen with me". Sometimes people want more power for the amp to be universal (play with any speakers in the future) or to stay away from higher distortions at max power. I’ve seen 300W amp specification with small note: "at 10% THD".
PS: Watt is watt. There is no RMS watts or RMS power. Average power (sum of momentary powers) is the one that is equivalent in heat to one produced by DC. Pavg=Vrms*Irms
