Uncompressed 720P on a powerbook? No. On a desktop, yes.
The problem is that with a powerbook, you’re limited to using FW drives, which don’t have enough bandwidth for uncompressed 720P. To work uncompressed, you’d need to work with a SCSI, Fiber Channel or SATA array.
OTOH, if you have the footage captured in it’s native DVC Pro HD codec, you might be able to cut the footage on a powerbook.
Arnie
https://www.arniepix.com