On Andriod page is infrmation, that Acer will not release new Android to "older" tablets. New Adroid 4.4 will be available only for Acer Tablets which will be released in 2014. This means one thing. Good bye Acer, next device will be Nexus or Samsung.
I was amazed that my A500 was not a candidate for future upgrades apparently due to hardware limitations. Some have hacked the A500 to go beyond 4.0 but you lose some functionality - details in Android forums.
This summer I bought a Nexus 7 and it's already running 4.4.2 KitKat as is my Nexus 4 phone
Acer Iconia B1 was released earlier this year (2013) and shipped with the obsolete Android 4.1.
Had I known in advance that Acer would leave all their tablet customers stuck with Android 4.1 I'd have stayed as far as possible from Acer tablets. No wonder why all these devices ended here in LATAM countries with cheap prices, no other country accepted them because they knew they were obsolete the second they left the factory.
[sarcasm]Great news to see that Acer won't release ANY updates whatsoever to a device manufactured this year and still announced in their tablets home page today. I'll always be a happy and loyal ACER customer and recommend their tablets to all my friends and family without doubt.[/sarcasm]