It really depends on what your looking for. Need to compare specs to what you need. If your in no hurry waiting to see what the next few months brings can't hurt. Major things to consider is size be 7 or 10 inch, wifi only or also data 3/4g. Other thing would be gb size and input output ports.
Is it worth getting a xoom at this point or would it be better to wait until the newer tablets come out?
Depends on how impatient you are and what you are looking for in your tablet. If you want it now then get a XOOM, if you don't need it for a while then just wait and then you can compare what's available. Later down the road there will be different screen sizes and different companies, and therefore different build qualities.
Another thing that could be a deciding point, if you want to do any rooting on your device the XOOM is probably going to be the best. The XOOM has an unlocked bootloader and is essentially root friendly since its the first of its kind, ala original Droid (first on 2.0).
Unless you want something ultra specific from your Android tablet then the XOOM is THE tablet. Its the Honeycomb flagship device, if your interested then I'd suggest getting it, its an incredible device.