Going by my Leopard/Tiger experience at the end of 2007, that's probably a fairly accurate assumption.You're assuming a replacement Mac bought after Friday won't continue to have Leopard support.
So you use your computer to make a living, and you just want vendor supported hardware. Now what? Ebay? Craigslist? Really?Your alternatives then are to buy second hand...
If the old one was was just broken, you could maybe get it repaired. But if it was stolen or destroyed or otherwise not repairable?
You do know that refurbs will also only come with SL as of Friday?... or refurb.