As others have implied... Its not really like that at all.
I suspect the "price reductions" have happened at the wholesaler, or just to the actual or notional RRP that these PCs (well laptops mainly with that manufacturer list) have.
Any reduction in the actual wholesale price has clearly not been passed on to the consumer. Also we are still suffering from the "netbook plague". Initially this kicked the pricepoint (and profit) out from under the notebook market until the netbook prices were bumped up to compensate.
The thing is Joe Consumer is led by the marketing and so will buy what is hitting headlines. In recent years this has been a netbook; 90% of which can't show him iPlayer which leads to consumer disappointment and even less buying in future. Had Joe bought a notebook then for similar money it would have been a do anything machine!
Now the "new thing" is indeed the fondle slab. This does at least provide a new physical footprint and smartphones show that for a lot of casual (or everyday) tasks the keyboard can be dispensed with. Thus we finally catchup with both Captain Kirk and John from the (original!) Tomorrow People. This is also where the marketing budgets are being spent. All marketing departments are incapable of promoting anything other than "the new thing" or two things at once. So the fondle slab gets the consumer spend.
As others have said there is also this kind of _recession_ thingy going on. Thus if one looks at the loss of revenue figures quoted in the article the loss follows the typical price of the product. Thus Toshiba and Sony suffer most, Asus next, and Acer which is usually cheap (if nothing else) suffers the least. The ONLY interesting figure is Samsung who appear to be defying this rule. So it appears that the consumer is avoiding expensive purchases and may be spending what money they do risk with Samsung or Acer.