It may have that at launch. (But notably not including stuff like Unearthed Arcana content, no?) I'm with the others; I have never known WotC to over-deliver for their digital offerings.
Mobile-access-wise, remember - smartphones and tablets were on the upswing back then, but nowhere near as ubiquitous. And... is there even a way to print your character sheet and spells??
Finally, as I edited in above, if you're 'buying' the books, you're captive to the platform with - near as I can tell - no way to get to 'your' books outside of the platform. Sounds like a crazy risk.
Fortunately this isn't an in-house development for WotC. Like I said most of the at launch functionality is already up and running. Mostly what's missing is the locked content.
The character sheet export to PDF isn't functional yet but is expected to be by launch.
I don't see a huge risk. i expct the platform to be around long enough to get a lot of use out of it. If it isn't around in 10 years then hopefully there will be something better.