We've commented on comparisons between HSDPA / 3G and Wi-Fi before in "WiFi loses out to 3G/HSDPA. Not Quite." and don't want to repeat the content here. Most of it is relevant to statements presented in recent articles that we believe would best have been entitled HSDPA marketing executive predicts HSDPA will triumph.
The articles in question are Ericsson predicts demise for hotspots and Ericsson predicts swift end for Wi-Fi hotspots. Commentary on Slashdot and the following blog on CNET News.com present a number of counter arguments in particular this one which points out that
Ericsson are a dealer in mobile internet devices. It is in their interest for people to move to mobile internet devices as people who buy mobile internet devices might by an Ericsson one. Ericsson don't do wifi hotspots, so there is no way using wifi hotspots puts money from your wallet into Ericsson's pocket. This displeases Ericsson, so they will now crow from the rooftops that wifi hotspots are dead, in a bid to drum up business for their absurdly-tariffed mobile internet devices.