Another emperors new clothes story.
As for other IT sectors there is very little that's truly new in the market. Big Data is just the Web 2.0 fad relabelled for analytics.
Teradata are doing nothing new, and only play in the foundations for Analytics - they are a Niche Datawarehousing player that's all. A very good niche player who can justify the premiums they charge but Niche nonetheless.
Even IBM and Oracle are doing nothing new. Both are struggling to merge their acquisitions into coherent stacks on the sales, functional and technical levels.
In summary - a bit more consolidation in the Analytixs space, and revolutionary Big Data use cases are very few and far between - even for most corporates. Big Data does not simply mean a big DWH.