Your guess would be as good as anyone's at this point. Sony claimed the GRT 190G would be out already by now and at least available for a pre-order back almost three weeks ago. It is not even available for pre-order yet, and talking to anybody in Sony sales is a joke. Instead of giving you the run around, they keep saying they don't know anything at all about this laptop or if it will even be available soon. If you try and quote them on what previous sales reps have said it is the same story, that they don't have anything further and cannot help you.
I read a rumor that they were having compatibility problems with the GIGA Pocket (TV Software) along with problems with a variety of the hardware components they are trying to use to put this laptop together. I don't remember where I read it , I think I just did a search on google and looked a bit further on the results it gave me.
If you want to sample Sony sales there is an online option via Sonystyle website , or you can actually call them if you really have no where else to spend your time during the day!
