The concern — as we understand it — stems from a lack of title announcements in one deft stroke. At E3 Sony focused on it's first-party content, at GamesCom it focused on very specific brands. There's a perception that third-party developers aren't adopting Sony's system.
But in reality, we've been getting new software announcements on a pretty regular basis. There's already at least 50 titles coming to Vita, and, we're sure, plenty more to be announced.
Some of those titles will be announced in Japanese gaming Bible, Famitsu, each week in the build up to September's Tokyo Game Show. SCEJ president Hiroshi Kono stated in a blog post that fans should expect an announcement in each issue of Famitsu between August 25th and September 15th.
Kono wouldn't elaborate on what titles to expect, but don't be surprised if there's at least one 'megaton' announcement as TGS closes in. A new RPG from Falcom, for example, is hotly rumoured.
The Tokyo Game Show kicks off on September 16th. Expect Sony to announce its full PlayStation Vita release plans during the event.