One thing is clear though - none of the DVD recording formats existing today are perfect, each with their own advantages and disadvantages. DVD-R/RW are cheaper and has the fastest burning speed (4x - unmatched for the time being), while DVD+R/RW employ better technology. It's hard to foresee which format will be the final DVD recording format (although at this time, you can pretty much rule out DVD-RAM as a DVD video recording format).
The Format Wars does not look like it will end anytime soon, which can actually be a good thing. As long as the Format Wars continue, you can be sure that none of the current DVD recording formats will be abandoned anytime soon, and so no matter which format you choose, you can be sure that it will be perfectly usable, probably long after your next computer upgrade. For those that want to be sure of this, you can purchase DVD recorders that support multiple formats, such as the Sony DRU500A or the Panasonic Multi Drive.
But with prices dropping quickly, and with DVD burning technology starting to mature, now is a good time to consider purchasing a DVD recorder.