A new report by the market research firm Display Search predicts that the market for all touch screen devices will grow to 660 million units by 2015. Notably the report predicts that such high volumes will drive down the cost of these devices. Though unsurprising, this could be good news for people with limited budget for technology products. 

The summary of the report provided on the Display Search website provides a good overview of various technologies aimed at improving tactile feedback.

See the full summary at: http://www.displaysearch.com/cps/rde/xchg/SID-0A424DE8-524D874E/displaysearch/hs.xsl/new_displaysearch_touch_panel_market_report_analyzes_fast_growing_area.asp.