This 'easy migration from Maya' thing has been around for quite a few months - well before Autodesk announced its acquisition of Alias.
In any case, I HIGHLY doubt that autodesk would kill Maya or most of alias' tools at this point, given the high popularity of Alias and their products within the large business world. Frankly, I'm not worried yet that Maya will be unplugged within 8-10 years at the least.
The press release
clearly states that "Autodesk will continue to develop the Alias product lines in conjunction with Autodesk's complementary products and technologies"
The press release goes on to say that the acquisition is "designed to leverage the strengths of both companies" (Doug Walker, CEO of Alias) and that basically Alias customers will be at the receiving end of benefits from "nearly $300 million in R&D spending" along with access to Autodesk products.
Though some of this may not be completely accurate, I don't think they can change much of their plan from the press release.
just my thoughts on't.
(though we all should give XSI a shot too for sure!)