Both formats have an uphill battle to fight. Standard DVDs outsold Blu-Ray by a substantial margin as well.
So what? Who is complaining?
Studios are not in any hurry. Doesn't cost any more to Universal or Paramount to have HD DVD discs pressed compared to SD DVD. There is a cost factor over SD DVD to produce Blu-Ray disc's but there's no evidence that Disney, Fox and others are getting impatient.
Studios want to sell movies... in any shape or form.