Waiting for SP1?
That may not work out so well for you.
MS claims that there will be continuous updates like those we have become used to on mobile platforms. Yes, there is a LTS version but it comes without a whole ton of stuff including Edge.
It remains to be seen how often installer ISOs will be released for the non-enterprise versions so perhaps, just perhaps, you could wait for a few of those to roll by? Or the odd security rollup?
But features will not be dropped by waterfall delivery in the way that they have in the past.
Service Pack? They don't need no stinkin' Service Pack.