If you're basing your value judgement on the price of similar games on the market right now then no, it's very very unlikely to be worth 70. There are critically acclaimed open world games that will likely beat this on content and potential enjoyment / play time for $5-10 right now.
Realistically, we're paying for the novelty though, if you're desperate for something new it might work. I told myself my price point was $60, but there will probably be some sort of discount on the way to or shortly after launch day for the PC version.
New warning label unlocked: Do not eat the Batteries.