With all of the hype and speculation over the last 6 to 9 months I think there will be a giant sigh of unrealized expectations if Apple doesn't come out with a tablet of some sort - which is not to say they wont be unveiling the next generation potato peeler next week
I wont be in the market for a new reader in the near future but if Apple does for eBooks what it did for MP3s I'll certainly be visiting their store!