Based on what we've heard Caroline from u2log report I'd guess that "Window In The Sky/Ceiling" is beachclip-400
"Can't You See" if the song is any of the beachclips that is.
"The words I remember are something like 'Look what love has done for us' or maybe 'What has love come to'."
Seems quite similar to:
Oh, can't you see
When your love is gone?
But the recording isn't perfect so I think it's possible that Bono sings:
"Oh, can't you see
What love has done?"
And afterwards at Abbey Road he probably changed some lyrics around.
And further on:
"Sort of 70's pop/crooner-Sweetest Thing kind of vibe."
I don't know about 70's pop or
crooner style of music but it has a prominent piano part like The Sweetest Thing has?
But I could still be wrong, we will find out soon.