Sony has a long history of trying to support indies. Net Yaroze was one example.
ITYM Sony (at least SCEA) has a long history of promising ideas and then dropping them.
PS1 - The Net Yaroze was launched and then left to die with minimal to zero support. All the cool stuff Europe did with the NY? We didn't see any of that in the US.
PS2 - The Linux kit was Net Yaroze, round two. Announce, ship, leave it to die.
PS3 - "WE'VE GOT LINUX!" "Screw you, we're taking it away."
PSP - They launched Minis...and left them to die. How many notable Minis (aside from Velocity and Canabalt can you name?)
Sony was pretty control freak during the PS2 gen and first half of the PS3 gen.
For the longest time, SCEA didn't even have any interest in promoting PSN titles to the press. Microsoft was all about getting XBLA titles covered. Sony didn't care.
Then, Vita arrived. And Vita was tanking. AAA developers were ignoring it.
Hail Mary play...GO LONG FOR INDIES!
With the platform hurting, it wasn't a huge risk to open it up and encourage smaller developers. It's not like Sony was short on dev kits.
The result was a change in both how Sony treated developers as well as ease of access. Because it changed so much, so quickly, it's news.
Time will tell if Sony supports this new initiative over the long term or if it ends up dropping it like a hot potato. If it ends up pushing Vita sales, Sony will probably consider it a success.