Hmm... I just downgraded my Internet because I did not feel like paying the cable fees/taxes (I do not watch cable or sports) and they came bundled with the higher speed. (You can now guess who my provider might be.)
My guaranteed speed is just 50Mbit/s, and despite being a software engineer and streaming movies, I did not notice a difference. My son has to wait longer for his steam downloads sometimes.
25GBit/s is impressive, though, and if I could get it here without strings attached I'd probably go for it, too.
BTW. My first experience was a dial-up model with 9600 baud, so maybe my expectations are just lower :)