The problem would be the media price Dolphy, since would be much higher than current DVD±R/RW media, since only (for now?) Mitsubishi Chemicals manufacturers them and since most manufacturers will have to invest new lines ($$$) of production to create +R9 DL media. Lastly the production would be limited, high demand, low volume -> high prices!
For sure drives will sell like hotcakes, however...Imagine buying a +R9 DL drive and have no media to burn? That would be funny
Anyway soon we will find out...won't we?
Actually, you are wrong by at least one, and possibly even two manufacturers
Maxell is already mass producing their DVD+R9's and I expect my own samples to arrive in the next couple of weeks. Maxell has stated that they expect their DVD+R9s to be on the shelves by sometime in June, to match up with the release of Sony's dual layer burner the DRU700a. However, Maxell is often a little slow, but still... they've been working on this for some time now.
Also, I have heard rumours that CMC is already assisting MCC/MKM with their DVD+R9 manufacturing (under the MCC code), which will very quickly reduce the price of the media. I don't have an estimated street value yet though.
As for Blu-Ray technology, I'm told that the release date for Maxell's media in North America had to be pushed back significantly because the Japanese market took it all. Supposedly Japan is all over the Blu-Ray stuff! or at least that's what my friend at Maxell told me.