Kiplinger.com has been looking into it and says your warranty will probably be good. It'll likely be looked after by either a federal fund set up for that purpose, the third party buying the brand, or a company that buys just the warranty operation.
Parts and service also should both be available, although at times, Kiplinger says, parts could be in short supply.
The real hit could come in resale value. Models belonging to defunct brands usually bring much less in the resale market.