I'm going to root my TF. Not now but within months after ICS.
- CIFS: mounting the shares in kernel space will be much more efficient than by the file-managers and will cure many lan-based video playing problems
- ext3/ext4 (I'm a linux guy and I have 6 1TB ext3/4 formatted HDDs with my data on them). Compared to real filesystems, fat32 and ntfs are so crappy.
- ethernet-over-usb. Last year (2011), I've been at a couple of resorts and wifi was un-usable between 8AM and 8PM (when all the kids have their ipod-touch ON.)
- trouble-shooting: the ability to read kernel logs and tweak procfs/sysfs is extremely powerful to figure out problems such as unresponsiveness, hi-cpu-usage, etc.
The sad thing is: Google/Asus could/should have included the first 3 items in the stock OS. There's nothing unsecure about providing cifs/ext3/ext4/ethernet-over-usb support. And then there's NFS. From what I can measure (a while ago) the xfer between my nas (a sheeva plug) and my mediaplayer (a sigma-based network media tank), nfs is significantly more efficient than CIFS/SMB.