Right now everybody is talking about HTML5 and its contains lots of new features like web sockets, canvas, new intput types with validation etc.
ASP.NET 4.5 text mode property enhancement:
With HTML5 new input types is going to be one of coolest feature and in future more and more people are going to use that feature. So in asp.net 4.5 asp.net development team given a support via TextMode property enhancements.
In earlier versions of ASP.NET we used have only three properties for TextMode property of asp.net textbox control.