Just like these things have been for (most) years.
MacExpo usually has something cool, special, or wanted (not needed ) each year
hell, that's why they have the show isn't it.
So, yes, something cool, wanted, special WILL be announced at MWSF (just after tax season ) - so wait if you want the newest - of what ever get's announced, or buy now and get some use out of it.
Me, I get caugth in the "Buy for taxes reason" each year, and then when and if they come out with...