Alright, Mearls has officially got me hooked.
As you've probably already read, the core 4 classes/races, up to level 20, plus basic core resolution rules and some basic monsters, will all be released by WotC for free as a .PDF download.
Yep, I'll be saving my money and just checking out the download.
If I like it, and some local groups pick up on 5E, I may pick up the PHB for the extra classes/spells/whatever other options. But that's something to decide once the game is out and I've had a chance or two to play it.
As it is now, though, WotC has finally moved me from a potential to a definite customer...although possibly only for their free stuff. We'll see.
And I'll likely still only run Classic D&D when I DM, but with FLAILSNAILS, who knows?