Wonder if it will apply to current Directv customers, hmmmm.
The answer is yes, in that DirecTV and U-verse are both properties of AT&T.
However, it is worth really looking at the deal to see if it's worthwhile.
First, understand that this AT&T move is likely in response to T-Mobile's unlimited streaming plan for certain types of video streams. This isn't to judge T-Mobile's offering; this is to provide a likely rationale for why AT&T is now doing what they're doing.
Secondly, according to what actual news materials AT&T has released, notice that each line (not group, in my understanding) carries a soft cap of 22GB before AT&T "may" enforce throttling. This is all comfortably ensconced within the verbiage talking about streaming (which is clearly what AT&T is going after here). If this is a per-line limit, that still far outweighs what AT&T charges on their current $100 Mobile Share plan; you can be the judge on that one.
Thirdly, they mention that while the base price is $100, which includes the pricing for the first smartphone on the plan, they're charging $40 per each additional smartphone. I'm not sure if the current $25 Mobile Share discount still applies. The fourth smartphone is free after two billing cycles, so you do pay at least $10/month more (assuming two smartphones on the same plan) after everything washes out (Next payments excluded). That would be $50 more with three smartphones and $80 more for the first two billing cycles for four. Apparently, tablets are no longer $10/month on this plan either; they're jacked up to $40 (or $10/month for 1GB), and even feature phones (any "relics" that don't use data) will be $25, also an increase.
We'll see the full details tomorrow.